Add a test for CombinedAndroidBuild #56

Job	Run time
build-installer-iso-job	2m 53s
test-iso-multidisk-qemu-empty-disk-job	2h 4m 41s
test-iso-multidisk-qemu-disk2-with-data-job	2h 12m 43s
test-iso-multidisk-qemu-disk5-with-data-job	2h 11m 58s
test-iso-qemu-job	1h 59m 13s
test-iso-cf-qemu-job	2h 1m 54s
	10h 33m 22s

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