Support prebuilt non-system IMEs in setPermittedInputMethods test

FIX: 70824267
Test: Sideloading a random IME, run the IME test in CtsVerifier.

Merged-in: I458f1e5c3b76886ba39730b5a04a41312f894d55

Change-Id: I458f1e5c3b76886ba39730b5a04a41312f894d55
2 files changed