Suppress warning of mixed oneway

This suppresses the following warning:

The interface 'ICompOsService' has both one-way and two-way methods.
This makes it hard to reason about threading of client code.
[-Wmixed-oneway]

The only oneway method in CompOsService is quit().

Bug: N/A
Test: no more warning
Change-Id: Ie16bc8c83757a452ed1706261d14e48561e4ee8d
diff --git a/compos/aidl/com/android/compos/ICompOsService.aidl b/compos/aidl/com/android/compos/ICompOsService.aidl
index 9b45e13..bfde6b6 100644
--- a/compos/aidl/com/android/compos/ICompOsService.aidl
+++ b/compos/aidl/com/android/compos/ICompOsService.aidl
@@ -17,6 +17,7 @@
 package com.android.compos;
 
 /** {@hide} */
+@SuppressWarnings(value={"mixed-oneway"})
 interface ICompOsService {
     /**
      * Initializes system properties. ART expects interesting properties that have to be passed from