aosp_arm64: add the android-4.19-stable Image.gz prebuilt am: b068fe1bc8 am: 7e0079fe88

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/4.19/arm64/+/11885398

Change-Id: I6ba5965225848cc66e17c2c739fd6eb8564e9a51
tree: 2368aa566cb205411d72160a6bdad37340de3efe
  1. .prebuilt_info/
  2. Image.gz