Move call to hide IME until next frame

When dismissing lockscreen after password input, delay call to
IInputMethodManager#hideSoftInput() until the next frame.

This avoids jank during J<LOCKSCREEN_PASSWORD_DISAPPEAR>

Test: atrace before/after
Bug: 230620476
Change-Id: I541eedcbe61350d04056086385f1cf96a1a28bfd
1 file changed