Add end-to-end test for Dynamic System Updates

Bug: 116513434
Test: lunch aosp_cf_x86_phone-userdebug, atest -v DSUEndtoEndTest -- --test-arg \
com.android.tradefed.testtype.HostTest:set-option:system_image_path:/full/path/to/system.img

Change-Id: Iac5e28d499908830bd8956a5c2ee0bb39539514d
6 files changed