Downgrade SuspiciousIndentation lint to a warning

The luni code has lots of messed-up indentation.
SuspiciousIndentation is a new Android Lint check
that causes a compilation failure if it finds
something.

Bug: 236431222
Test: Presubmits
Change-Id: I918ea36eb1011f8478e9422afe6d9a052fa8b233
1 file changed