Add config to enable / disable VirtualDeviceManager

Bug:287295010

Test: Flashed watch and saw VDM was started also tested case where the flag was set to false.

Change-Id: I3126aa76d7239f1e7c86c7b869e7e79651df079a

core/res/res/values/config.xml

@@ -198,6 +198,9 @@
          service. Off by default, since the service may not be available on some devices. -->
     <bool name="config_enableProximityService">false</bool>
 
+    <!-- Enable or disable android.companion.virtual.VirtualDeviceManager. Enabled by default. -->
+    <bool name="config_enableVirtualDeviceManager">true</bool>
+
     <!-- Whether dialogs should close automatically when the user touches outside
          of them.  This should not normally be modified. -->
     <bool name="config_closeDialogWhenTouchOutside">true</bool>

core/res/res/values/symbols.xml

@@ -418,6 +418,7 @@
   <java-symbol type="bool" name="config_localDisplaysMirrorContent" />
   <java-symbol type="bool" name="config_ignoreUdfpsVote" />
   <java-symbol type="bool" name="config_enableProximityService" />
+  <java-symbol type="bool" name="config_enableVirtualDeviceManager" />
   <java-symbol type="array" name="config_localPrivateDisplayPorts" />
   <java-symbol type="integer" name="config_defaultDisplayDefaultColorMode" />
   <java-symbol type="bool" name="config_enableAppWidgetService" />

services/java/com/android/server/SystemServer.java

@@ -2440,8 +2440,9 @@ public final class SystemServer implements Dumpable {
                 t.traceBegin("StartCompanionDeviceManager");
                 mSystemServiceManager.startService(COMPANION_DEVICE_MANAGER_SERVICE_CLASS);
                 t.traceEnd();
+            }
 
-                // VirtualDeviceManager depends on CDM to control the associations.
+            if (context.getResources().getBoolean(R.bool.config_enableVirtualDeviceManager)) {
                 t.traceBegin("StartVirtualDeviceManager");
                 mSystemServiceManager.startService(VIRTUAL_DEVICE_MANAGER_SERVICE_CLASS);
                 t.traceEnd();