Implement and use adb push for PlatformAndroid::PutFile

Using the adb push protocol is significantly faster than the current method of
sending the hex encoded file data for the remote to write to the file.

Test Plan:
Tests continue to pass - and much faster (e.g. TestSBValuePersist.py takes 10s
down from 4m51s on mac -> android)

Differential Revision: http://reviews.llvm.org/D9943

llvm-svn: 238274