Add maxTargetSdk restriction to unused APIs.

These are APIs that have @UnsupportedAppUsage but for which we don't
have any evidence of them currently being used, so should be safe to remove
from the unsupported list.

Bug: 170729553
Test: Treehugger
Merged-In: I5d00bf19d21a860e8bc3ad9d0aa5abc47881c816
Change-Id: If02c021a0bcc2bd10e06ad694c428bfbff2afbbf
1 file changed