Enable host build for libcamera_metadata

Test: Builds OK
Change-Id: I56f58dc1e872554717d50e340326131f80079cbb
diff --git a/camera/Android.bp b/camera/Android.bp
index fdd9b0f..cc2b5dd 100644
--- a/camera/Android.bp
+++ b/camera/Android.bp
@@ -5,6 +5,7 @@
     vendor_available: true,
     // TODO(b/153609531): remove when no longer needed.
     native_bridge_supported: true,
+    host_supported: true,
     vndk: {
         enabled: true,
     },