Allow explicit blacklisting with maxTargetSdk=0.

This allows other annotation properties to be added to blacklisted APIs,
such as publicAlternatives. The semantics are identical to not having
any annotation on the API.

Bug: 136102585
Test: m, inspect out/soong/hiddenapi/hiddenapi-flags.csv
Change-Id: I2fbcb630a4a7719984f31d9531aca4f4b658db95
1 file changed