Merge "Enable shrinking for EasterEgg" am: f760323d10 am: 7eda1221b9 am: a4b5b1ed66

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2263585

Change-Id: I4df86bcf76146dd37114b591d6204f243ec461b2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

packages/EasterEgg/Android.bp

@@ -36,7 +36,7 @@ android_app {
     certificate: "platform",
 
     optimize: {
-        enabled: false,
+        proguard_flags_files: ["proguard.flags"],
     },
 
 	static_libs: [

packages/EasterEgg/proguard.flags

@@ -0,0 +1,4 @@
+# Note: This is a very conservative keep rule, but as the amount of app
+# code is small, this minimizes any maintenance risks while providing
+# most of the shrinking benefits for referenced libraries.
+-keep class com.android.egg.** { *; }