Make lunch/mmma targets configurable and add new Android compile bot

Bug: skia:8560
Change-Id: I9287d8286a49d067c14a4cc560220c08d3c0c040
Reviewed-on: https://skia-review.googlesource.com/c/172865
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
8 files changed