Remove android/build_android.sh.
Remove android/build_android.sh.

build_android.sh is broken and fixing it seems not be worth it.
Especially since building on android is already well supported
using ndk-build.

build_android.sh is also dependent on android-cmake, which is
recently has been a flakey dependency.

Change-Id: I8a22e6e2ef7f1708cd23bd38e33eb17189666509

ikoruk/ceres-solver,timfel/ceres-bin,ikoruk/ceres-solver,ysonggit/ceres-solver,whuaegeanse/ceres-solver,DougFirErickson/ceres-solver,timfel/ceres-bin,stonier/ceres_solver,entylop/ceres-solver,ysonggit/ceres-solver,DougFirErickson/ceres-solver,ikoruk/ceres-solver,entylop/ceres-solver,stonier/ceres_solver,entylop/ceres-solver,DougFirErickson/ceres-solver,entylop/ceres-solver,timfel/ceres-bin,timfel/ceres-bin,whuaegeanse/ceres-solver,ikoruk/ceres-solver,kartikkumar/ceres-solver,ikoruk/ceres-solver,whuaegeanse/ceres-solver,stonier/ceres_solver,ysonggit/ceres-solver,DougFirErickson/ceres-solver,stonier/ceres_solver,kartikkumar/ceres-solver,kartikkumar/ceres-solver,whuaegeanse/ceres-solver,ysonggit/ceres-solver,kartikkumar/ceres-solver