Make gfxstream apex_available to the virt APEX

gfxstream modules are used by crosvm which are included in the APEX

Bug: 174639241
Test: m com.android.virt

Change-Id: Ie171eadb345e6d877acdc8313639f27ddca21f6e
diff --git a/Android.bp b/Android.bp
index d3e7410..17530b9 100644
--- a/Android.bp
+++ b/Android.bp
@@ -11,7 +11,11 @@
         "stream-servers/vulkan",
         "stream-servers/glestranslator/include",
         "stream-servers/OpenGLESDispatch",
-    ]
+    ],
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 cc_library_headers {
@@ -19,7 +23,11 @@
     host_supported: true,
     export_include_dirs: [
         "stream-servers/apigen-codec-common",
-    ]
+    ],
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 cc_defaults {
@@ -59,4 +67,9 @@
         }
     },
     host_supported: true,
+
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }