Before this change, all the gomobile commands forced Go modules
to be off internally, regardless of the current Go modules state.
After this change, gomobile-init command follows the current Go
modules state. The other gomobile commands are not changed.
This is also a preparation to support Go modules in gomobile-bind
and gomobile-build.
Updates golang/go#27234
Change-Id: I3d9eedd667cba4d30de3ac0543f037be36cd3e51
Reviewed-on: https://go-review.googlesource.com/c/mobile/+/210477
Run-TryBot: Hajime Hoshi <hajimehoshi@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
1a1fef8273