Treat IME adjust flags correctly

- IME insets always get reported through WindowInsets.getInsets(ime())
- However, getSystemWindowInsets will not report it if ADJUST_RESIZE
isn't set.
- Fix bitmask check for ADJUST_RESIZE

Test: InsetsStateTest
Test: WindowInsetsTest
Fixes: 146465040
Bug: 111084606
Change-Id: Ib19c89050af4f669ddda14d2bf2415aa3b5092c1