Revert "Temp. disable `libnativeloader_e2e_tests` in Mainline Presubmits." am: 62c1ada55e

Original change: https://android-review.googlesource.com/c/platform/art/+/2310532

Change-Id: Ie270e3276ba75bc06b2969bfb2104c384cf2806e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>