Adding OWNERS files for services/sensorservice, libs/sensor

Test: n/a
Change-Id: I696adec7831f95f22fc91988e644e55392c60b46
diff --git a/libs/sensor/OWNERS b/libs/sensor/OWNERS
new file mode 100644
index 0000000..6a38a1f
--- /dev/null
+++ b/libs/sensor/OWNERS
@@ -0,0 +1,2 @@
+ashutoshj@google.com
+pengxu@google.com