Add BATTERY_STATS_OWNERS to OWNERS for battery stats tests

Test: N/A
Change-Id: I1115bb151454b2c86332388d40e13cdfb9db66a0
diff --git a/tests/BatteryWaster/OWNERS b/tests/BatteryWaster/OWNERS
new file mode 100644
index 0000000..4068e2b
--- /dev/null
+++ b/tests/BatteryWaster/OWNERS
@@ -0,0 +1 @@
+include /BATTERY_STATS_OWNERS