Drop device/anbox and move anbox tree into vendor/

Change-Id: I445fb5c4fbf18a812fcddf7cbfd91c0b735916ae

default.xml

@@ -29,7 +29,6 @@
   <project path="developers/demos" name="platform/developers/demos" />
   <project path="developers/samples/android" name="platform/developers/samples/android" />
   <project path="development" name="platform/development" groups="pdk-cw-fs,pdk-fs" />
-  <project path="device/anbox" name="device_anbox" remote="anbox" revision="master" />
   <project path="device/common" name="device/common" groups="pdk-cw-fs,pdk-fs" />
   <project path="device/generic/common" name="device/generic/common" groups="pdk" />
   <project path="device/google/accessory/arduino" name="device/google/accessory/arduino" groups="device" />
@@ -519,5 +518,5 @@
   <project path="tools/test/connectivity" name="platform/tools/test/connectivity" />
   <project path="tools/tradefederation" name="platform/tools/tradefederation" groups="notdefault,tradefed" />
 
-  <project path="anbox" name="anbox" remote="anbox" revision="master" />
+  <project path="vendor/anbox" name="anbox" remote="anbox" revision="master" />
 </manifest>