Merge tag android-5.1.0_r1 into AOSP_5.1_MERGE

Change-Id: I227b9170b610f3bd0ba0e57e4eb3174df6ff1bad
tree: a9281cbfdd4e3450e445b80bea491e9c59df4b88
  1. src/
  2. Android.mk
  3. build.gradle
  4. jarjar-rules.txt
  5. update_prebuilts.sh