microdroid_manager: initial impl

It is started by init in microdroid and executes a command specified in
a VM payload config.

Bug: 189301496
Test: MicrodroidHostTestCases
  (in a microdroid, run /system/bin/microdroid_manager manulally)
Change-Id: I85c7e370d4a0dcf58b4aafbe6e9fba73e69c2a44
diff --git a/microdroid_manager/microdroid_manager.rc b/microdroid_manager/microdroid_manager.rc
new file mode 100644
index 0000000..c800002
--- /dev/null
+++ b/microdroid_manager/microdroid_manager.rc
@@ -0,0 +1,4 @@
+service microdroid_manager /system/bin/microdroid_manager
+    disabled
+    # TODO(jooyung) remove this when microdroid_manager becomes a daemon
+    oneshot
\ No newline at end of file