backout 7a1706d0e5b0 to 8c8b6adebb4c for frequent failures in scrolling/text-1.html and scrolling/text-2.html reftests on a CLOSED TREE

widget/android/nsScreenManagerAndroid.cpp

@@ -45,7 +45,9 @@ nsScreenAndroid::GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWid
 NS_IMETHODIMP
 nsScreenAndroid::GetPixelDepth(int32_t *aPixelDepth)
 {
-    *aPixelDepth = AndroidBridge::Bridge()->GetScreenDepth();
+    // XXX do we need to lie here about 16bpp?  Or
+    // should we actually check and return the right thing?
+    *aPixelDepth = 16;
     return NS_OK;
 }