Move media3 effect artifact to new folder.

We need to create a new group name for the artifact, because it cannot move to stable with the rest of the CameraX artifacts. As per suggestion from the AndroidX team, we will also move the code location based on the output of ./development/project-creator/create_project.sh.

Relnote: change media3effect library group name and create new code path.

Bug: 380310983
Test: manual test and ./gradlew bOS
Change-Id: I65ca4f0e2fa29278fb96d892aacc489897b02417
diff --git a/camera/media3/OWNERS b/camera/media3/OWNERS
new file mode 100644
index 0000000..15331e5
--- /dev/null
+++ b/camera/media3/OWNERS
@@ -0,0 +1 @@
+# [email protected]