r8: Update R8 to 2.0.7-dev

Took AOSP master repo which removes compatdx, compatproguard, d8
and added locally built r8 with warnings and verbose disabled.

Change-Id: Ia311a71224a88ce8e9028d4c1774872b832ada8c
Signed-off-by: mydongistiny <jaysonedson@gmail.com>
15 files changed