Merge "Revert "Revert "Icon: make Icon's Bitmaps immutable""" into tm-dev am:...

Merge "Revert "Revert "Icon: make Icon's Bitmaps immutable""" into tm-dev am: edea3fd4 am: 7d879954 am: cd063104 am: 8c444990

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17943164



Change-Id: Ie571082332bf3b7e3a8d5a752f5a5d3cb6f7c056
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>