Add POLICY_FLAG_PASS_TO_USER while hovering is active

In the following hover event sequence: ENTER->MOVE->EXIT, the policy might not set POLICY_FLAG_PASS_TO_USER after the MOVE event is received. This would cause MOVE and EXIT events to be dropped. This would later cause problems with stream consistency, because the following HOVER_ENTER event would not be expected.

So add POLICY_FLAG_PASS_TO_USER to the hover event while hovering is active, even if the policy does not add
POLICY_FLAG_PASS_TO_USER.

Bug: 299055469
Test: atest inputflinger_tests

Change-Id: If99e493a6a645c66a18a97351763f00a37dc1dc0
Signed-off-by: Linnan Li <lilinnan@xiaomi.corp-partner.google.com>