Changed interceptor dialog text for suspended apps

Title: App isn't available
Body: <suspended app name> isn't available right now. This is managed by
<suspending app name>.

Test: atest \
com.android.server.pm.SuspendPackagesTest#testInterceptorActivity

Bug: 79134961
Change-Id: I0e77a4045a8c709c528c4163830d2ad396d6bf1b