Merge "Add keep rules for SysUI plugin annotations" am: 1df98adda8

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2619797

Change-Id: Ic620f8bb76745ae5c47d6294ccabff6ee53fce94
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

packages/SystemUI/plugin_core/Android.bp

@@ -25,6 +25,9 @@ java_library {
     sdk_version: "current",
     name: "PluginCoreLib",
     srcs: ["src/**/*.java"],
+    optimize: {
+        proguard_flags_files: ["proguard.flags"],
+    },
 
     // Enforce that the library is built against java 8 so that there are
     // no compatibility issues with launcher

packages/SystemUI/plugin_core/proguard.flags

@@ -0,0 +1,11 @@
+# R8's full mode is a bit more aggressive in stripping annotations, but the
+# SystemUI plugin architecture requires these annotations at runtime. The
+# following rules are the minimal set necessary to ensure compatibility.
+# For more details, see:
+# https://r8.googlesource.com/r8/+/refs/heads/master/compatibility-faq.md#r8-full-mode
+-keepattributes RuntimeVisible*Annotation*,AnnotationDefault
+
+-keep interface com.android.systemui.plugins.annotations.** {
+    *;
+}
+-keep,allowshrinking,allowoptimization,allowobfuscation,allowaccessmodification @com.android.systemui.plugins.annotations.** class *