Merge "Set prebuilt_apis java_imports sdk_version to none" am: 5fa230dede am: 99e0e4a664

Original change: https://android-review.googlesource.com/c/platform/prebuilts/sdk/+/1405927

Change-Id: I2b2b20b36ee02b91dbc0cf51d2f4893d79d4aa5e