More javadoc for capabilities

Link the capabilities for creating protected & non-protected to the
mechanism for doing so.

Test: N/A
Change-Id: I36521083d7788870e350f202f8498d4b9e53c005
diff --git a/javalib/src/android/system/virtualmachine/VirtualMachineManager.java b/javalib/src/android/system/virtualmachine/VirtualMachineManager.java
index 2802659..1250bd1 100644
--- a/javalib/src/android/system/virtualmachine/VirtualMachineManager.java
+++ b/javalib/src/android/system/virtualmachine/VirtualMachineManager.java
@@ -92,13 +92,19 @@
     })
     public @interface Capability {}
 
-    /* The implementation supports creating protected VMs, whose memory is inaccessible to the
-     * host OS.
+    /**
+     * The implementation supports creating protected VMs, whose memory is inaccessible to the host
+     * OS.
+     *
+     * @see VirtualMachineConfig.Builder#setProtectedVm
      */
     public static final int CAPABILITY_PROTECTED_VM = 1;
 
-    /* The implementation supports creating non-protected VMs, whose memory is accessible to the
+    /**
+     * The implementation supports creating non-protected VMs, whose memory is accessible to the
      * host OS.
+     *
+     * @see VirtualMachineConfig.Builder#setProtectedVm
      */
     public static final int CAPABILITY_NON_PROTECTED_VM = 2;
 
@@ -120,6 +126,7 @@
      */
     @TestApi
     public static final String FEATURE_DICE_CHANGES = IVirtualizationService.FEATURE_DICE_CHANGES;
+
     /**
      * Feature to run payload as non-root user.
      *