Support IME Window to show in secondary display.
1) Moving WMS.setInputMethodWindowLocked to DisplayContent,
each display can have its own IME window.
2) Add getDisplayIdFromWindow in WindowManagerInternal,
used for InputMethodManagerService to know which display
for given IME window token.
3) Support add / remove IME window according displayId.
4) Modify WMS.inputMethodClientHasFocus to traverse all active display
if inputMethodClient focused.
5) Add displayId parameter for IInputMethod.initializeInternal to
update context display then client can addView to right display.
Note: 1) There should be zero behavior difference as long as the target
app is running on the default display.
2) The current implementation is not final and there are still
chances that the current IME may not work well or even crash
depending on how the IME is implemented.
Bug: 111364446
Test: manual, use ActivityView & launch Messages in VirtualDisplay,
tap search icon to see if soft input keyboard shown &
app window size is adjusted by soft input.
Change-Id: I8da315936caebdc8b2c16cff4e24192c06743251
13 files changed