Port h264_bit_reader from Chromium

Slight modifications

file: src/media/filters/h264_bit_reader.*
commit head: 2112e70060f2f7f51fe594d02884703e74f1a582

Bug: 32691050
Test: mmm external/v4l2_codec2
Change-Id: I180dc428950395704e6d41e4235b19fc8b842cad
4 files changed
tree: 7d51868fb227a38da9ac4060cc424364d4fe67c0
  1. vda/
  2. Android.mk