Make FLAG_LAYOUT_NO_LIMITS compatible

The content of a window with FLAG_LAYOUT_NO_LIMITS can extend into
system bar areas before android R, but not in R, which is not
compatible.

Fix: 166391803
Test: atest ImeInsetsSourceConsumerTest InsetsControllerTest
      InsetsStateTest
Change-Id: I2470a4eeb9f0f291321e21d42bc6e9c52e7a8e9d