Revert "Revert "Ensure only com.android.shell can run in the shell domain.""

This reverts commit bf0c2a59.

Bug:68126425
Test: No apps affected by not being able to run in shell domain
Change-Id: I8b93eecd023fbb392a98253d721dad75f79b61f4

private/seapp_contexts

@@ -91,6 +91,10 @@ neverallow user=((?!_isolated).)* domain=isolated_app
 # uid's can be in shell domain
 neverallow user=shell domain=((?!shell).)*
 
+# only the package named com.android.shell can run in the shell domain
+neverallow domain=shell name=((?!com\.android\.shell).)*
+neverallow user=shell name=((?!com\.android\.shell).)*
+
 # Ephemeral Apps must run in the ephemeral_app domain
 neverallow isEphemeralApp=true domain=((?!ephemeral_app).)*
 
@@ -102,7 +106,7 @@ user=nfc seinfo=platform domain=nfc type=nfc_data_file
 user=secure_element seinfo=platform domain=secure_element levelFrom=all
 user=radio seinfo=platform domain=radio type=radio_data_file
 user=shared_relro domain=shared_relro
-user=shell seinfo=platform domain=shell type=shell_data_file
+user=shell seinfo=platform domain=shell name=com.android.shell type=shell_data_file
 user=webview_zygote seinfo=webview_zygote domain=webview_zygote
 user=_isolated domain=isolated_app levelFrom=all
 user=_app seinfo=media domain=mediaprovider name=android.process.media type=app_data_file levelFrom=user