Do not give up on images where first zip is not for Linux
Do not give up on images where first zip is not for Linux

When the system image had multiple urls for multiple OSes we always
picked the first url, then later we filtered it out if it contained the
"windows" or "darwin" strings. Now we look for the "linux" url first.

google/android-emulator-container-scripts,google/android-emulator-container-scripts,google/android-emulator-container-scripts,google/android-emulator-container-scripts