Revert "androidtest.bash: wait for device to be ready before using it"
Revert "androidtest.bash: wait for device to be ready before using it"

This reverts commit 27b9571de800c05a41081ea80cd934e48e0a8f70.

Reason for revert: broke the multi-device Android builder. And the wait logic is moving to the exec wrapper anyway.

Change-Id: I3e429106bbe70b3a12286f8f229a2b558279eec4
Reviewed-on: https://go-review.googlesource.com/c/163620
Run-TryBot: Elias Naur <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@eliasnaur.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

nawawi/go,josharian/go,golang/go,cloudflare/go,nawawi/go,josharian/go,nawawi/go,nawawi/go,golang/go,CAFxX/go,CAFxX/go,golang/go,akutz/go,akutz/go,golang/go,josharian/go,cloudflare/go,CAFxX/go,josharian/go,nawawi/go,akutz/go,cloudflare/go,CAFxX/go,golang/go,golang/go,golang/go,akutz/go,akutz/go,cloudflare/go,josharian/go,josharian/go,akutz/go,cloudflare/go,golang/go,josharian/go,CAFxX/go,nawawi/go,josharian/go,CAFxX/go,nawawi/go,CAFxX/go,CAFxX/go,akutz/go,cloudflare/go,cloudflare/go,cloudflare/go,nawawi/go,akutz/go