cli: add `--list-devices` flag to list detected devices (#269) #404

Job	Run time
build-v-examples-as-apk-and-aab (ubuntu-20.04, 8, 27)	1m 54s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 8, 27)	1m 54s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 8, 30)	1s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 8, 30)	1s
build-v-examples-with-gc-disabled (ubuntu-20.04, 8, 27)	3m 19s
build-v-examples-with-gc-disabled (ubuntu-20.04, 8, 27)	3m 19s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 11, 27)	2m 29s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 11, 27)	2m 29s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 11, 30)	2m 14s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 11, 30)	8m 15s
build-v-examples-with-gc-disabled (ubuntu-20.04, 8, 30)	3m 41s
build-v-examples-with-gc-disabled (ubuntu-20.04, 8, 30)	3m 41s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 15, 27)	2m 33s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 15, 27)	2m 33s
build-v-examples-with-gc-disabled (ubuntu-20.04, 15, 27)	4m 10s
build-v-examples-with-gc-disabled (ubuntu-20.04, 15, 27)	4m 10s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 15, 30)	1m 57s
build-v-examples-as-apk-and-aab (ubuntu-20.04, 15, 30)	1m 57s
build-v-examples-with-gc-disabled (ubuntu-20.04, 15, 30)	3m 47s
build-v-examples-with-gc-disabled (ubuntu-20.04, 15, 30)	3m 47s
	58m 11s

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