Bug 1292323 - Update WrapForJNI usages; r=snorp

Replace old flags in WrapForJNI usages with new flags. The calledFrom
and dispatchTo flags are set based on whether the method is native or
non-native, and how the method is used.

Also fix testEventDipatcher to respect NativeJSObject's calledFrom =
"gekco" flag, by moving a test to Gecko thread.

widget/android/nsScreenManagerAndroid.cpp

@@ -64,7 +64,7 @@ nsScreenAndroid::GetPixelDepth(int32_t *aPixelDepth)
       return NS_ERROR_FAILURE;
     }
 
-    *aPixelDepth = java::GeckoAppShell::GetScreenDepthWrapper();
+    *aPixelDepth = java::GeckoAppShell::GetScreenDepth();
     return NS_OK;
 }