Merge "Attempt to clear memory after keyguard PIN entry" into sc-dev am: f16b3f76aa am: abd75290ad am: 44ed3ed920

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15502355

Change-Id: I845e8bb647310ae0be45500f713a86ad9c6ecf4f