Handle back key to cancel text action mode in full-screen IME.
This CL is a follow up to I7998c8ee2162a0e01525a0cd66ec14fa505,
which completely removed ExtractActionMode including back key
handling in InputMethodService when full-screen mode is enabled.
It turns out that back key events still need to be handled in
InputMethodService when full-screen mode is enabled so that
users can still cancel floating text action mode with back key.
Bug: 22034992
Change-Id: I5f8db34f7425eef343d40d9820925ea6aaf9fccc
2 files changed