Adding method to check if the drawable is themed or not am: fc33a2fa7d am: 4ed5fea6e4

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

Change-Id: I1c049314fe0bca74b401ee9b80247e76911bc090
tree: 3f16a8de74161f581449edfe12af8266839da0b6
  1. iconloaderlib/
  2. searchuilib/