Add mfasheh@ and shayba@ as owners of TestLooperManagerTest.java

Precursor to ag/30617344 which will add TestLooperManagerTest.java

Adding this here because this OWNERS file is AOSP-first.

Bug: 379472827 
Change-Id: Ibc102101064e93209a45e3dc4004533436dc6b3c
Flag: android.os.message_queue_testability