DO NOT MERGE Call mutate on notification shade drawable before editing.

All drawables, by default, are shared in memory thus this would affect other
unintended elements to also have their alpha set.

Bug: 134407440
Test: Manual
Change-Id: Ieb26146b67c0cb7d2bfd3213993238be2da68c23
(cherry picked from commit 0b7e45ebc5f1030fe77f3cfe2a542095d9fa6f80)
1 file changed