codecs: switch to c2 as default

some tests wont pass without c2, such
as the following

BUG: 161312828
Test: none
Change-Id: Ie00b428eb1f4da4d824c994f6a3d9be771b71d68
Merged-In: Ie00b428eb1f4da4d824c994f6a3d9be771b71d68
diff --git a/init.ranchu.rc b/init.ranchu.rc
index 9be9885..d2e5bde 100644
--- a/init.ranchu.rc
+++ b/init.ranchu.rc
@@ -62,7 +62,8 @@
     setprop ro.opengles.version ${ro.kernel.qemu.opengles.version}
     setprop ro.zygote.disable_gl_preload 1
 
-    setprop debug.stagefright.ccodec 0
+    # 0: omx; 4: c2 default now
+    setprop debug.stagefright.ccodec 4
     setprop debug.stagefright.ccodec ${ro.kernel.qemu.media.ccodec}
 
     setprop dalvik.vm.heapsize 192m