Update to JDK build 11.0.15+0-8484286 am: bb0b310a72

Original change: https://android-review.googlesource.com/c/platform/prebuilts/jdk/jdk11/+/2072709

Change-Id: I2c127ab040413f18d82b797cbf18a0b925b6ac4a
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>