Switch to a shell_and_utilities phony module.

(cherrypick of 8ad0e66e77c795d11e9cd5c7b576eed0da60537e.)

Bug: N/A
Test: builds
Change-Id: I700700abb4de76017a2ff811ceff19ea2ee86eb2
diff --git a/shell_and_utilities/Android.bp b/shell_and_utilities/Android.bp
new file mode 100644
index 0000000..81cf315
--- /dev/null
+++ b/shell_and_utilities/Android.bp
@@ -0,0 +1,13 @@
+phony {
+    name: "shell_and_utilities",
+    required: [
+        "bzip2",
+        "grep",
+        "gzip",
+        "mkshrc",
+        "reboot",
+        "sh",
+        "toolbox",
+        "toybox",
+    ],
+}