Do not keep runtime invisible annotations in proguard.flags

This updates the corresponding Android.bp file to keep the runtime invisible annotations, meaning this should be a no-op.

When RELEASE_R8_ONLY_RUNTIME_VISIBLE_ANNOTATIONS is enabled, keep_runtime_invisible_annotations will become a no-op, which should lead to all runtime invisible annotations being stripped from this build.

Bug: 387958004
Change-Id: I588152e4d9fb650cd000bcf60df9e6882935ad1a
Test: existing
diff --git a/android/TerminalApp/Android.bp b/android/TerminalApp/Android.bp
index 545ba0f..79f0094 100644
--- a/android/TerminalApp/Android.bp
+++ b/android/TerminalApp/Android.bp
@@ -40,6 +40,7 @@
         //optimize: true,
         proguard_flags_files: ["proguard.flags"],
         shrink_resources: true,
+        keep_runtime_invisible_annotations: true,
     },
     apex_available: [
         "com.android.virt",