Added support for Android's per-app language setting. #2950

Job	Run time
Automated tests (25)	31m 45s
Automated tests for Custom app (25)	10m 51s
Automated tests (30)	41m 38s
Automated tests on Tablet (25)	7m 25s
Automated tests for Custom app (30)	15m 39s
Automated tests for PlayStore variant (25)	10m 23s
Automated tests (33)	1h 47m 29s
Automated tests on Tablet (30)	8m 9s
Automated tests for Custom app (33)	10m 48s
Automated tests for PlayStore variant (30)	11m 8s
Automated tests (34)	1h 47m 35s
Automated tests on Tablet (33)	7m 46s
Automated tests for Custom app (34)	10m 39s
Automated tests for PlayStore variant (33)	17m 38s
Automated tests (35)	37m 6s
Automated tests on Tablet (34)	7m 30s
Automated tests for Custom app (35)	12m 57s
Automated tests for PlayStore variant (34)	19m 25s
Automated tests on Tablet (35)	9m 48s
Automated tests for PlayStore variant (35)	12m 9s
	8h 17m 48s

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