Adjust ime insets for stack scroll layout

This ensures that inline replies are properly displayed with IME, now
that the window will not automatically resize due to the removal of
the LayoutParams.SOFT_INPUT_ADJUST_RESIZE flag.

Test: atest
InputMethodStressTest: com.android.inputmethod.stresstest.NotificationTest
Fixes: 259788831
Change-Id: I3d86786d19f8f1de8da7f7d3f5f0a129919f2a4d