Remove binderClearCallingIdentity()

Clearing calling identity results in subsequent package visibility
filtering useless.

Bug: 187042120
Test: atest MixedDeviceOwnerTest#testApplicationRestrictions
Test: atest MixedManagedProfileOwnerTest#testDelegation
Test: atest SilentPackageInstallTest#testUninstallBlocked
Test: atest DevicePolicyManagerTest\
        #testSetUninstallBlocked_succeedForNotInstalledApps
Test: manually using the PoC in the buganizer to ensure the symptom
      no longer exists.
Change-Id: Ie0e2daa70eb76e455b2546f96c9a9c8bb3eabd34