Merge branch 'security-aosp-pi-release' into int/p/fp2

* security-aosp-pi-release:
  DO NOT MERGE KeyChain protect against overlays.
  DO NOT MERGE Hide overlay on KeyChainActivity

Change-Id: I1cf11c2aaf60c694a05bce996b95f85631ca82c4
tree: baa3f4e1d94058748b71740b590d2fe5b382ae67
  1. res/
  2. robotests/
  3. src/
  4. support/
  5. tests/
  6. Android.mk
  7. AndroidManifest.xml