Ask for PIN when granting permissions in front of lock screen

Test: - Revoked all permissions from camera
      - Set lock screen PIN
      - Opened camera app -> Camera app asks for permissions
      - Locked screen
      - Granted permission from in front of lock screen
Bug: 68777217, 65337954
Merged-In: I8358f1eba436786b25b2c2b0c12ac7dcfd334fec
Change-Id: I3f252e2c325bd638ea29d1ce63b12e391e13c8f0
(cherry picked from commit b5302e67)