Add the `testDragCustomShortcut` back for phones.

testDragCustomShortcut was ignored, but as discussed, enabling it for
phones - where the layout of picker is unchanged.

Bug: 322820039
Test: Un-ignoring the test
Flag: N/A
Change-Id: I3607812befc58c8a46b49a2587dfa6a1b572cd5b
1 file changed