libperfmgr: add dump interface

Bug: 72071908
Test: Call added interface in powerhal and check
      lshal-debug/android.hardware.power@1.2::IPower_default.txt

(cherry picked from commit b243f99965c7f9b780854233273f9d8f9e13b39c)

Change-Id: Ib2c63d40e772c0004abc1157f523eae0a357b261
diff --git a/libperfmgr/OWNERS b/libperfmgr/OWNERS
new file mode 100644
index 0000000..03c33cd
--- /dev/null
+++ b/libperfmgr/OWNERS
@@ -0,0 +1 @@
+wvw@google.com