Fixed: Someone has reported a crash for `ZimFileReader.getFavicon`. #3656

Job	Run time
Automated tests on Tablet (30)	12m 3s
Automated tests on Tablet (25)	9m 12s
Automated tests on Tablet (33)	9m 35s
Automated tests on Tablet (36)	12m 21s
Automated tests on Tablet (35)	13m 44s
Automated tests (36)	48m 41s
Automated tests (25)	41m 55s
Automated tests (33)	44m 58s
Automated tests on Tablet (34)	10m 0s
Automated tests (35)	54m 5s
Automated tests (30)	54m 48s
Automated tests for PlayStore variant (25)	11m 25s
Automated tests (34)	53m 24s
Automated tests for PlayStore variant (34)	11m 30s
Automated tests for PlayStore variant (33)	11m 29s
Automated tests for PlayStore variant (36)	11m 29s
Automated tests for Custom app (30)	12m 16s
Automated tests for PlayStore variant (35)	11m 31s
Automated tests for Custom app (35)	13m 30s
Automated tests for PlayStore variant (30)	11m 28s
Automated tests for Custom app (33)	15m 7s
Automated tests for Custom app (36)	13m 20s
Automated tests for Custom app (34)	11m 52s
Automated tests for Custom app (25)	12m 50s
	8h 32m 33s

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