[automerger skipped] Remove exported_java_libs from com.android.art prebuilt_apex am: 256e72110f -s ours

am skip reason: Merged-In I9292768743cbdaa43515451114ba42cbc74976fd with SHA-1 3348742f52 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/ArtPrebuilt/+/15047047

Change-Id: I8581ed13f37917037b475ce4233a89ce06eef87c