Switch Linux android tests to ubuntu

All staging testbeds have been switched to ubuntu, and this CL changes to that.

Fixes devicelab_benchmark failures: https://ci.chromium.org/p/flutter/g/devicelab_benchmark/console

Change-Id: I90679ab8a054885b9655d2ea1a342472f4c6d2e0
Reviewed-on: https://flutter-review.googlesource.com/c/infra/+/30912
Reviewed-by: Aaron Clarke <aaclarke@google.com>
Reviewed-by: Zach Anderson <zra@google.com>
Reviewed-by: Yusuf Mohsinally <mohsinally@google.com>
Commit-Queue: Keyong Han <keyonghan@google.com>
diff --git a/config/devicelab_staging_config.star b/config/devicelab_staging_config.star
index 14968b2..3823952 100644
--- a/config/devicelab_staging_config.star
+++ b/config/devicelab_staging_config.star
@@ -15,8 +15,7 @@
 load("//lib/timeout.star", "timeout")
 
 # Global OS variables
-LINUX_OS = "Debian"
-LINUX_VM_OS = "Ubuntu"
+LINUX_OS = "Ubuntu"
 MAC_OS = "Mac-12"
 WINDOWS_OS = "Windows-10"
 XCODE_VERSION = "13f17a"  # xcode 13
diff --git a/config/generated/flutter/luci/cr-buildbucket.cfg b/config/generated/flutter/luci/cr-buildbucket.cfg
index 0e04aa6..ef2c3db 100644
--- a/config/generated/flutter/luci/cr-buildbucket.cfg
+++ b/config/generated/flutter/luci/cr-buildbucket.cfg
@@ -129813,7 +129813,7 @@
       name: "Linux_android flutter_gallery__transition_perf"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -129909,7 +129909,7 @@
       name: "Linux_android flutter_gallery__transition_perf_e2e"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -130005,7 +130005,7 @@
       name: "Linux_android flutter_gallery__transition_perf_hybrid"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -130101,7 +130101,7 @@
       name: "Linux_android flutter_gallery__transition_perf_with_semantics"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -130299,7 +130299,7 @@
       name: "Linux_android flutter_gallery_sksl_warmup__transition_perf"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -130395,7 +130395,7 @@
       name: "Linux_android flutter_gallery_sksl_warmup__transition_perf_e2e"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -142987,7 +142987,7 @@
       name: "Linux_android_staging android_obfuscate_test"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -143083,7 +143083,7 @@
       name: "Linux_android_staging microbenchmarks"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -143179,7 +143179,7 @@
       name: "Linux_android_staging test_drone"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_os:N"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -143257,7 +143257,7 @@
       name: "Linux_samsung_a02_staging complex_layout_scroll_perf__timeline_summary"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_type:SM-A025V"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -143354,7 +143354,7 @@
       name: "Linux_samsung_a02_staging flutter_gallery__transition_perf"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_type:SM-A025V"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -143451,7 +143451,7 @@
       name: "Linux_samsung_a02_staging new_gallery__crane_perf"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_type:SM-A025V"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -143548,7 +143548,7 @@
       name: "Linux_samsung_a02_staging new_gallery__transition_perf"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_type:SM-A025V"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"
@@ -143645,7 +143645,7 @@
       name: "Linux_samsung_a02_staging opacity_peephole_one_rect_perf__e2e_summary"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "device_type:SM-A025V"
-      dimensions: "os:Debian"
+      dimensions: "os:Ubuntu"
       dimensions: "pool:luci.flutter.staging"
       exe {
         cipd_package: "flutter/recipe_bundles/flutter.googlesource.com/recipes"