Expose timestats device library

This is needed to be cherry-picked into rvc-tv-dev
for device-side parsing of timestats in TVTS.

Bug: 175727771
Change-Id: I742476772c45c7602ba5b330d0874da7353500f4
Test: Add timestats-proto to an Android.mk file
Test: which is used to build the java file referencing
Test: the timestats.proto
Test: Used in whole PoC ag/13148066
Test: Confirm the parsing works.