Add roomservice

Partial squash of:

	From e33ba4c4 Mon Sep 17 00:00:00 2001
	From: Jeff Brown <jeffbrown@google.com>
	Date: Mon, 11 Jul 2011 22:11:46 -0700
	Subject: [PATCH] Remove the simulator target from all makefiles. Bug: 5010576

	From: Ying Wang <wangying@google.com>
	Date: Thu, 3 Mar 2016 20:57:21 -0800
	Subject: [PATCH] Speed up lunch/tapas/etc. shell utility functions.
	1. Combined ~10 calls to the make build system to only one.
	   We added a phony target "dump-many-vars" to the build system to dump
	   "<var>=<value>" pairs. We then store the pairs as shell variables.
	   With this cache get_build_var/get_abs_build_var can just return
	   the shell variables instead of querying the build system.
	2. Prune .git when we search for AndroidProduct.mks.
	In internal source tree lunch time was reduced from ~15s to ~1.5s.
	Bug: 27429759
	(cherry picked from commit 08800fd9)
	Change-Id: I862a0ec3c1aae97c552054dacec133e857042edf

	From ec92ea87 Mon Sep 17 00:00:00 2001
	From: Luca Stefani <luca.stefani.ge1@gmail.com>
	Date: Sun, 1 Jan 2017 21:45:07 +0100
	Subject: [PATCH] lunch: Use cd - instead of popd
	* ZSH breaks a lot of things.
	Change-Id: Idee8485bee673bebf6fe5857253306b20aa92eb5

	From c2dcf4b1 Mon Sep 17 00:00:00 2001
	From: Luca Stefani <luca.stefani.ge1@gmail.com>
	Date: Thu, 5 Jan 2017 16:30:15 +0100
	Subject: [PATCH] build: Replace pushd with cd
	* For consistency
	Change-Id: I96711e3be7b73ebadd589f460e5c5e90d000a4f7

	From 587463c7 Mon Sep 17 00:00:00 2001
	From: Koushik Dutta <koushd@gmail.com>
	Date: Sat, 26 Nov 2011 18:51:42 -0800
	Subject: [PATCH] roomservice delivers you lunch combos from the CyanogenMod
	 github.
	fix roomservice formatting
	support product names with _ in them
	fix roomservice to handle pagination
	Change-Id: I4923c2f768094dbad8e06a72d9f27d46414030ab

Change-Id: I5bb07944f558e3e5551ab65c97ecfa303609be57