Keep sensor events for default flush operation

Current code clear captured sensor events before execute flush
operation. However, this is not the intended behavior.

The bug is introduced in change I3bcc2e0485dd45ec34cb936d5cc5ad1f76ce8d59,
when createFlushOperation is refactored.

Test: SensorBatchingTest passes
Bug: 63645563
Change-Id: Ifcdcdd0114a843b9494206f9daeefa059a4259b5
1 file changed