Disable PipMovesInAllApps temporarily

Test's currently failing due to the new `device search`, disable for
now to unblock presubmit and re-enable once we have a working solution.

Bug: 184050344
Test: atest WMShellFlickerTests:com.android.wm.shell.flicker.pip
Change-Id: I6b75ea213b442400090ee0a3f2b7e46ee5ecd395