Add team property to all modules.

This allows vendors (like google) to specify which team owns the test
module and code.

Team is a commonProperty on modules and points to the designate "team"
module.  The DepsMutator adds the dependency on the "team" module and
"GenerateBuildActions" write the team data to intermediate files.

A new singleton rule, all_teams visits all modules and writes out
the proto containing the team for each module.
If a module doesn't have a team, then it finds the package in the
blueprint file and parent directory blueprint files that have a
default_team and uses that team.

Test: m all_teams
Test: go test ./python ./java ./cc ./rust ./android
Test: added team to HelloWorldHostTest and built the new asciiproto target
Test: added package default_team and checkout output proto.
Change-Id: I5c07bf489de460a04fc540f5fff0394f39f574a7
diff --git a/android/team_proto/regen.sh b/android/team_proto/regen.sh
new file mode 100755
index 0000000..63b2016
--- /dev/null
+++ b/android/team_proto/regen.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+aprotoc --go_out=paths=source_relative:. team.proto