Change ownership of AAPT2 and libandroidfw

toddke@ is now the new owner of these projects.

Exempt-From-Owner-Approval: setting new owners
Test: none
Change-Id: Ie92b020e0ba063f48ce8a76ebaef768fe0d554f1
Merged-In: Ie92b020e0ba063f48ce8a76ebaef768fe0d554f1
(cherry picked from commit a95e8418)