Add test cases for existence filter with updated/added documents #10648

Job	Run time
Build Firestore	17m 11s
Test Firestore Compatible	5m 35s
Test Firestore Compatible on Firefox	6m 51s
Test Firestore on Firefox (test:browser)	7m 20s
Test Firestore on Firefox (test:travis)	4m 16s
Test Firestore on Firefox (test:lite:browser)	1m 53s
Test Firestore on Firefox (test:browser:prod:nameddb)	7m 21s
Test Firestore on Firefox (test:lite:browser:nameddb)	2m 7s
Test Firestore (test:browser)	7m 3s
Test Firestore (test:travis)	4m 10s
Test Firestore (test:lite:browser)	1m 41s
Test Firestore (test:browser:prod:nameddb)	7m 35s
Test Firestore (test:lite:browser:nameddb)	2m 15s
Check all required tests results	1s
	1h 15m 19s

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