Add last interacted window check in setInTouchMode

Allow touch mode switch if caller owns the focused window.
If no window is currently focused, then touch will be still allowed if
caller owned one of the previously interacted window.

Bug: 218541064
Test: atest inputflinger_tests
Test: atest InputDispatcherTouchModeChangedTests
Change-Id: I5cfa879a6e1358efe3781061c5712707da813967