Ignore access from a different user

This shouldn't happen, but if it does we should just ignore it rather
than crashing system server.

Modify the tests to match.

Bug: 323665257
Bug: 326190135
Test: atest PackageDynamicCodeLoadingTests
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:1aea0e915748d661e2bdf251e34bdc32d22ce0e9)
Merged-In: I2ae7f506b15133f45f00c24e909f49d56fc23e66
Change-Id: I2ae7f506b15133f45f00c24e909f49d56fc23e66