Add AvatarPicker to GSI

AvatarPicker is now moved to system_ext, but this is still required from
GSI as GSI keeps system_ext image within the system image. This change
adds AvatarPicker to Soong-defined GSI image.

Bug: 370352548
Test: N/A
Change-Id: Ib78ed5631b22ea30c0e59b14031541dc94922281
diff --git a/target/product/gsi/Android.bp b/target/product/gsi/Android.bp
index dafbe46..8c200a1 100644
--- a/target/product/gsi/Android.bp
+++ b/target/product/gsi/Android.bp
@@ -209,4 +209,14 @@
         true: true,
         default: false,
     }),
+    multilib: {
+        common: {
+            deps: select(release_flag("RELEASE_AVATAR_PICKER_APP"), {
+                true: [
+                    "AvatarPicker", // handheld_system_ext (RELEASE_AVATAR_PICKER_APP)
+                ],
+                default: [],
+            }),
+        },
+    },
 }