Merge "Keep methods annotated with @JavascriptInterface" am: f43f66335a

Original change: https://android-review.googlesource.com/c/platform/build/+/2510958

Change-Id: Ica553fa8e77462113b1079a72913b6c22fed4953
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/proguard_basic_keeps.flags

@@ -41,6 +41,11 @@
     java.lang.Object readResolve();
 }
 
+# Keep all Javascript API methods
+-keepclassmembers class * {
+    @android.webkit.JavascriptInterface <methods>;
+}
+
 # Keep Throwable's constructor that takes a String argument.
 -keepclassmembers class * extends java.lang.Throwable {
   <init>(java.lang.String);