Revert "Revert "Do not propogate test api access flags to Zygote.""

This reverts commit 9c2ab16c.

Reason for revert: Fixed broken tests. Enable TestApi access for the
target package, and not the test package itself. By default, target
package is a test package, however, it is possible to run a test under
a different instremented package name.

Test: atest CameraEvictionTest#testBasicCamera2ActivityEviction
      atest com.google.android.security.gts.PackageVerifierTest#testNormalInstallInfoCorrect
      atest com.google.android.security.gts.AppIntegrityManagerTest#testRuleEvaluation_update
Bug: 178391911,147113465
Change-Id: I0bf109fa78212d6d71ba85d25f80e27e8e7cd900