Merge changes from topic "obex.getHeader.IOException" into main

* changes:
  getHeader wrongfully throws IOException
  Activate errorprone and fix them
  Set formatter and presubmit
diff --git a/OWNERS b/OWNERS
index 6495c10..5320981 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,4 +2,5 @@
 
 klhyun@google.com
 siyuanh@google.com
-include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}
+
+# No janitors here because there is no upstream; this code came from frameworks/base/.