ci: optimize KMP workflow and update Gradle memory settings #2111

Job	Run time
Build (Unit-tests & Android-Lint)	3h 35m 49s
Android UI-tests on emulator (28, default)	7m 31s
Android UI-tests on emulator (25, default)	8m 3s
Android UI-tests on emulator (32, default)	8m 24s
Android UI-tests on emulator (30, default)	4h 19m 40s
Android UI-tests on emulator (23, default)	7m 56s
Android UI-tests on emulator (29, default)	4h 19m 43s
Android UI-tests on emulator (26, default)	7m 20s
Android UI-tests on emulator (31, default)	2m 50s
Android UI-tests on emulator (35, default)	8m 58s
Android UI-tests on emulator (34, default)	8m 36s
Android UI-tests on emulator (27, default)	7m 41s
Android UI-tests on emulator (33, default)	7m 57s
Android UI-tests on emulator (37, default)	34s
Android UI-tests on emulator (36, default)	8m 52s
Android UI-tests on emulator (24, default)	4m 37s
	13h 44m 31s

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