Fixing a bug where content capture sessions with child sessions could get stuck in a state where no event flushing other than forced flushes would occur

Fixes: 139202268
Test: atest CtsContentCaptureServiceTestCases
Change-Id: I21e9d4db2402fe5210b7d938dac2f12e7557c146
(cherry picked from commit 52ed9ee0387fa4faa91deff970dde779e2ff2f9f)
1 file changed