Remove '&' class loader context. am: 982ecedecd am: acccafbf6c am: 86812bf951 am: a5b7525a9f

Original change: https://android-review.googlesource.com/c/platform/art/+/1654955

Change-Id: Iab661debab75fceb82b3b39da4f8b11a943ef2e9