Use the existing drawable API to get the bitmap

Instead of adding bitmap specific APIs we are expecting applications to pass bitmap drawables.

This is in follow up to ag/13081407

Bug: 172068293
Bug: 170343703
Test: Manual
Change-Id: Ibfeb9a588c20bb9dc81205f0cd513de68e53aece
Merged-In: Ibfeb9a588c20bb9dc81205f0cd513de68e53aece
7 files changed