Don't obfuscate Launcher3

Change-Id: I86ac745602c0d3c09842ed9553f7589c232f5d23
diff --git a/proguard.flags b/proguard.flags
index 6a9d6f3..a8e2b60 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -1,3 +1,7 @@
+-keep,allowshrinking,allowoptimization class com.android.launcher3.** {
+  *;
+}
+
 -keep class com.android.launcher3.BaseRecyclerViewFastScrollBar {
   public void setWidth(int);
   public int getWidth();
@@ -63,4 +67,4 @@
 -keep class com.android.launcher3.Workspace {
   public float getBackgroundAlpha();
   public void setBackgroundAlpha(float);
-}
\ No newline at end of file
+}