b8ce081c1a
When intentional API breakages are made, the incompatibilities tracking file must be updated. This makes the failing build rule output the baseline/incompatibilities file that would have made the build rule succeed. This file can then be used to update prebuilts/sdk. Whilst here, also make metalava quiet so we don't need to capture stdout. Test: make breaking change, build compat rule, inspect output dir Change-Id: Ia95b65548371329cd467fd3093db92b471e6986d