dashboard: use androidtest.bash for android builds
dashboard: use androidtest.bash for android builds

Change-Id: I4763f6a572bf62ada3fde44b9fcb099d9539c7d0
Reviewed-on: https://go-review.googlesource.com/14270
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/build,proppy/build,proppy/build,golang/build,golang/build,proppy/build,proppy/build,golang/build