Re-enable KeyguardLockedTests for PiP2

Re-enable the test cases in KeyguardLockedTests that were disabled when
PiP flag is on.

Flag: com.android.wm.shell.enable_pip2
Bug: 379758804
Bug: 383602326
Test: atest KeyguardLockedTests
Change-Id: Id72ce3c6d06ded4856099b0b9df265ffc6a80b29
1 file changed