commit 4b6acb4f39a628eef9710a2a4e235dd9f56d9cab
author Tarandeep Singh <tarandeep@google.com> Tue Oct 29 15:27:16 2019 -0700
committer Taran Singh <tarandeep@google.com> Sat Nov 23 04:13:28 2019 +0000
tree e14ce6857dd6f82d574256640a76daf88b85f235
parent 659f477f65a8eda41190b927dc7f72907920f209

DO NOT MERGE: Move startInput for WINDOW_FOCUS_GAIN to background thread

For a typical window with Editor, IMM#startInputOrWindowGainedFocus
is called twice: first for WINDOW_FOCUS_GAIN (dummyInput), then
CHECK_FOCUS when actual editor receives focus and startsInput.
The first once can be moved to background thread and second startInput
will wait till its finished.

Bug: 139806621
Test: Manually launch activities with editors and confirm no change in
behavior.

Change-Id: I6aa4a664cfd0c86f75cee2457715317194bbe5e2
(cherry picked from commit e0172102b9c9a9640209e3223bb6c60fe1d5cabb)