Disallow loading icon from content URI to PipMenu

Bug: 278246904
Test: manually, with the PoC app attached to the bug
Merged-In: Ib3f5b8b6b9ce644fdf1173548d9078e4d969ae2e 
Change-Id: Ib3f5b8b6b9ce644fdf1173548d9078e4d969ae2e
1 file changed