Adding method to check if the drawable is themed or not am: fc33a2fa7d am: 625c8a5bd1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/libs/systemui/+/14686825

Change-Id: I6df15d1b8fae35dec9e29ff48c33d239e69ceec6
tree: 3f16a8de74161f581449edfe12af8266839da0b6
  1. iconloaderlib/
  2. searchuilib/