Send TV direct keys to global key handler to handle

The TV direct keys added by ag/15936307 should be sent to global key handler to handle, which is handled at the end of
interceptSystemKeysAndShortcuts().

Bug: 349753425
Flag: EXEMPT bugfix
Test: manual test
Test: atest KeyEventInterceptTest
Change-Id: I69fb930f6735e94330f1c16694f67430952cd583