CWAC-SafeRoom 1.2.1 Released

CWAC-SafeRoom 1.2.1 is available both for the saferoom.x artifact (for use with AndroidX) and the saferoom artifact (for use with the Architecture Components).

This fixes a bug where char[] passphrases were not being cleared after use and adds a test case to catch any future regressions in this area.

Also, this update moves the project to Android Gradle Plugin 3.5.1.

If you have any questions or feedback, start a fresh topic in the CWAC category here. If you encounter a bug, read the contribution guidelines, then file an issue.