Add private API InputMethodManager#reportVirtualDisplayGeometry

This logically relands the change [1] which added an @hide api
InputMethodManager#reportActivityView() with renaming as
reportVirtualDisplayGeometry().

Because ActivityView was removed, this API was removed [2] once.
However, because this API is useful for OEM customization, this change
adds the same API with a generalized method name.

Note that there was a change on how cross-display input connection
cursor update is blocked [3]. Thus, this CL adapts to it.

[1] Id0411a80456182111bb5b681c6d1230b58e7ec2e
[2] Idd60d96a39f827197d189beb5de016446576d9cd
[3] Iec12733d37e112b7271436bba15094ae2a55a450

Bug: 224424149
Test: manual. Cursor is updated in cross-display connection.
Change-Id: I35b491da5a340844e17542d7a6198f8152bbeda3