Extend scan timeout logic to downgrade regular scan

- Apply scan timeout for the filtered regular scan
- Bug fix for scan timeout logic
- Add unit test cases to verify scan control logic

Tag: #feature
Bug: 233614676
Test: atest BluetoothInstrumentationTests:ScanManagerTest

Change-Id: I5a8faaa3f12661750ee580b20a58a07ec11b4efc
Merged-In: I5a8faaa3f12661750ee580b20a58a07ec11b4efc