[DO NOT MERGE] Add FLAG_SECURE for ChooseLockPassword and Pattern am: aac79b894f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/19961566

Change-Id: I2a898ea074fa01c6ffd8742e9d41762bed20fab4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>