Fix array-related errorprone warnings

The ArrayEquals, ArrayHashCode, ArrayToString, and
ArraysAsListPrimitiveArray errorprone findings were
demoted from errors to warnings. Fix existing
occurrences of them so they can be made errors again.

Bug: 242630963
Test: RUN_ERROR_PRONE=true m javac-check
Change-Id: Ida6513002f8fd845a385924be290b720f06c4748