Update SQLCipher to 4.9.0 and revise related configs, tests, and docu… #1534

Job	Run time
Build (Unit-tests & Android-Lint)	15m 32s
Android UI-tests on emulator (22, default)	5m 55s
Android UI-tests on emulator (21, default)	5m 58s
Android UI-tests on emulator (23, default)	6m 18s
Android UI-tests on emulator (25, default)	12m 12s
Android UI-tests on emulator (29, default)	5m 25s
Android UI-tests on emulator (26, default)	6h 0m 29s
Android UI-tests on emulator (27, default)	6h 0m 39s
Android UI-tests on emulator (24, default)	5m 2s
Android UI-tests on emulator (30, default)	5m 53s
Android UI-tests on emulator (28, default)	6h 0m 31s
Android UI-tests on emulator (33, default)	5m 7s
Android UI-tests on emulator (34, default)	5m 26s
Android UI-tests on emulator (31, default)	5m 42s
Android UI-tests on emulator (36, default)	38s
Android UI-tests on emulator (35, default)	7m 31s
Android UI-tests on emulator (32, default)	15m 51s
	19h 44m 9s

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