Add gsi_tool and DynamicAndroidInstallationService to base_system

Bug: 122015653
Test: run "adb shell am ..." to trigger DynamicAndroidInstallationService
      full command: adb shell am start-activity -a
        android.content.action.START_INSTALL -e KEY_SYSTEM_URL <file_url>
        --el KEY_SYSTEM_SIZE <system_image_size> --el KEY_USERDATA_SIZE 8589934592
Test: run "adb shell gsi_tool"

Change-Id: I4045a16dd50066c8a303be13c524ed4c09f60f87