Support building traced on the host for Android

This is hopefully a step toward testing performance of Android
executables that run on the host (e.g. crosvm).

Bug: b/283171575
Test: -
  $ tools/install-build-deps --android
  $ tools/gen_android_bp
  $ m traced
Change-Id: Ife8224a2978ab1b1250cd295283c22702b792ad6
diff --git a/Android.bp b/Android.bp
index f4f9a2d..5a3186d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -13095,15 +13095,22 @@
         "src/traced/service/main.cc",
     ],
     shared_libs: [
-        "liblog",
         "libperfetto",
     ],
+    host_supported: true,
     init_rc: [
         "perfetto.rc",
     ],
     defaults: [
         "perfetto_defaults",
     ],
+    target: {
+        android: {
+            shared_libs: [
+                "liblog",
+            ],
+        },
+    },
 }
 
 // GN: //src/profiling/perf:traced_perf