Revert "[femu] Update vdl version to 20210719_RC00"

This reverts commit 1f920392ac9cac823190c3a1863c4dde8a4c9a53.

Reason for revert: fxb/81182

Original change's description:
> [femu] Update vdl version to 20210719_RC00
>
> This version deprecates amber_ctl
>
> Bug: 194125736
> Change-Id: I25123b0b11e07866e574fa010855ac5a705023f6
> Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/15744
> Reviewed-by: Godofredo Contreras <godofredoc@google.com>
> Commit-Queue: Yuan Zhi <yuanzhi@google.com>

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 194125736
Change-Id: I2858afaf575cf0020a6d9b228cda287ba6ef35b7
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/15861
Reviewed-by: Yuan Zhi <yuanzhi@google.com>
Reviewed-by: Godofredo Contreras <godofredoc@google.com>
Reviewed-by: Darren Chan <chandarren@google.com>
Commit-Queue: Yuan Zhi <yuanzhi@google.com>
diff --git a/recipes/femu_test.expected/dangerous_test_commands.json b/recipes/femu_test.expected/dangerous_test_commands.json
index a29ae6e..795e8b2 100644
--- a/recipes/femu_test.expected/dangerous_test_commands.json
+++ b/recipes/femu_test.expected/dangerous_test_commands.json
@@ -569,7 +569,7 @@
       "-root",
       "[CACHE]/builder/vdl",
       "-ensure-file",
-      "fuchsia/vdl/${platform} g3-revision:vdl_fuchsia_20210719_RC00",
+      "fuchsia/vdl/${platform} g3-revision:vdl_fuchsia_20210316_RC00",
       "-max-threads",
       "0",
       "-json-output",
diff --git a/recipes/femu_test.expected/start_femu_with_vdl.json b/recipes/femu_test.expected/start_femu_with_vdl.json
index 652c540..4052e3d 100644
--- a/recipes/femu_test.expected/start_femu_with_vdl.json
+++ b/recipes/femu_test.expected/start_femu_with_vdl.json
@@ -569,7 +569,7 @@
       "-root",
       "[CACHE]/builder/vdl",
       "-ensure-file",
-      "fuchsia/vdl/${platform} g3-revision:vdl_fuchsia_20210719_RC00",
+      "fuchsia/vdl/${platform} g3-revision:vdl_fuchsia_20210316_RC00",
       "-max-threads",
       "0",
       "-json-output",
diff --git a/recipes/femu_test.py b/recipes/femu_test.py
index c930a87..ca84ec6 100644
--- a/recipes/femu_test.py
+++ b/recipes/femu_test.py
@@ -103,7 +103,7 @@
     )
 
   def addVDLFiles():
-    vdl_version = api.properties.get('vdl_version', 'g3-revision:vdl_fuchsia_20210719_RC00')
+    vdl_version = api.properties.get('vdl_version', 'g3-revision:vdl_fuchsia_20210316_RC00')
     api.vdl.set_vdl_cipd_tag(tag=str(vdl_version))
     add(api.vdl.vdl_path, 'device_launcher')
     add(api.vdl.aemu_dir, 'aemu')