gopls/internal/regtest: re-enable android builder
gopls/internal/regtest: re-enable android builder

Remove the exception for the Android amd64 builder, now that flakes are
fixed (though the exception didn't actually work anyway due to
golang/go#39460).

Also, accept the import reorganization applied by gopls.

Fixes golang/go#43554

Change-Id: I9a7cce35998cfa673699d74a487111e4daecf7ec
Reviewed-on: https://go-review.googlesource.com/c/tools/+/284935
Trust: Robert Findley <9179eee875d1ee628c37fb47d7e749e855ffd21f@google.com>
Run-TryBot: Robert Findley <9179eee875d1ee628c37fb47d7e749e855ffd21f@google.com>
gopls-CI: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Rebecca Stambler <d7cf11e5f299d88ea8348366a9fc4f7c335c3afa@golang.org>

golang/tools,golang/tools,golang/tools,golang/tools,golang/tools