Suspending app can customize intercepting dialog

The suspending app has more context about why a particular app was
suspended by the user, but we do not want to delegate the interception
of the suspended activity out of the system.
Hence allowing it further customizations to the dialog to make
it clearer.

Test: atest com.android.server.pm.SuspendDialogInfoTest \
com.android.server.pm.SuspendPackagesTest \
com.android.server.pm.PackageUserStateTest \
com.android.server.pm.PackageManagerSettingsTests \
com.android.server.am.ActivityStartInterceptorTest

atest GtsSuspendAppsPermissionTestCases GtsSuspendAppsTestCases

Bug: 112486945
Bug: 113150060
Change-Id: If9f4d14587a2b75bb572e7984a90e300a2c72d16