Merge "Update prebuilt signapk to #7584760 aosp-arm64" am: 9d1522fae2 am: 11b0a3c93e

Original change: https://android-review.googlesource.com/c/platform/prebuilts/sdk/+/1778917

Change-Id: I7c26c801702ac41a2b48272572bbd1cfdd127a30