Don't try to compress opus resources

Test: build

Change-Id: Ibf398b3afca02d4111d88b126c8d107ac44068a6
diff --git a/tools/aapt/Package.cpp b/tools/aapt/Package.cpp
index d631f35..f06643dc 100644
--- a/tools/aapt/Package.cpp
+++ b/tools/aapt/Package.cpp
@@ -28,7 +28,7 @@
 
 /* these formats are already compressed, or don't compress well */
 static const char* kNoCompressExt[] = {
-    ".jpg", ".jpeg", ".png", ".gif",
+    ".jpg", ".jpeg", ".png", ".gif", ".opus",
     ".wav", ".mp2", ".mp3", ".ogg", ".aac",
     ".mpg", ".mpeg", ".mid", ".midi", ".smf", ".jet",
     ".rtttl", ".imy", ".xmf", ".mp4", ".m4a",