Remove the receiver from merged manifests.

ExportedComponentTests verify if all receivers in Package Installer Activity are exported, including the manifests in its dependencies. This exported receiver was causing test failures. However, since it cannot be marked as non-exported, removing it from merged manifests of Package Installer

Bug: 269666304
Test: atest PackageInstallerTests:ExportedComponentTest
Change-Id: I3cd6b846b24be7d18565305f8b4c8ccd13172b13