Support single command of using remote ab build mixed with local GSI system image by acloud.

Bug: 213494874
Test: acloud-dev create --branch git_sc-gsi-release --build-target aosp_cf_x86_64_phone-userdebug --local-system-image ${ANDROID_BUILD_TOP}/out/target/product/generic_x86_64 --local-instance -vv
Change-Id: Ibfd0103bc55d9734b324453c87068325b17b7ce7
5 files changed