Bug 750434 - Enable azure content on android. r=nrc

modules/libpref/src/init/all.js

@@ -369,6 +369,8 @@ pref("gfx.content.azure.backends", "cairo");
 
 #ifdef ANDROID
 pref("gfx.textures.poweroftwo.force-enabled", false);
+pref("gfx.content.azure.backends", "cairo");
+pref("gfx.content.azure.enabled", true);
 #endif
 
 pref("gfx.work-around-driver-bugs", true);