Revert "Add atrace and multinetwork symbols to NDK"

I did a bad job of reviewing this. This is libandroid.so, not a new
library. We need to keep all the old symbols here too. I'll copy in
android-21 first, then add these back.

This reverts commit 00b322bb0508ce8b2d4f3bfee74aaae362ead086.

Bug: http://b/29936226
Change-Id: Ia3d7762599c29cc97add0c3f8a93b9562bed53f6
12 files changed