Previously Java 8 bytecode was transpiled into Java 7 bytecode for AAR.
With this change we instead include Java 8 bytecode in the AAR.
This drops support for Java 7 but allows using Java 8 features such as
static methods in interfaces and default methods.
Bug: webrtc:8084, chromium:762967
Change-Id: I3c6ec9332c5612b7ed811a81957f25c94c80da70
No-Try: True
Reviewed-on: https://webrtc-review.googlesource.com/21222
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20849}