Rename microdroid_launcher domain to microdroid_app

As the payload is in a shared library, microdroid_launcher domain is
used as-is when running microdroid app. This changes the domain name to
microdroid_app, because microdroid_launcher does nothing but just launch
the microdroid app.

Bug: 189706019
Test: atest MicrodroidHostTestCases
Change-Id: Id30b4a85cc1b9023a93546d33b6071863e9268ee
diff --git a/microdroid/sepolicy/system/private/shell.te b/microdroid/sepolicy/system/private/shell.te
index 7c786c9..03490b0 100644
--- a/microdroid/sepolicy/system/private/shell.te
+++ b/microdroid/sepolicy/system/private/shell.te
@@ -193,7 +193,7 @@
 
 # Allow shell to launch microdroid_launcher in its own domain
 # TODO(b/186396070) remove this when microdroid_manager can do this
-domain_auto_trans(shell, microdroid_launcher_exec, microdroid_launcher)
+domain_auto_trans(shell, microdroid_app_exec, microdroid_app)
 domain_auto_trans(shell, microdroid_manager_exec, microdroid_manager)
 
 # Never allow others to set or get the perf.drop_caches property.