Convert all comments into "doxygen-ready" comments.

Bug: 36453077
Test: mma
Change-Id: I0b1f77dfae5d2258969e33d85ecf45401ffbdfaa
diff --git a/gnss/1.0/IGnssBatchingCallback.hal b/gnss/1.0/IGnssBatchingCallback.hal
index a8f4b88..5697cc4 100644
--- a/gnss/1.0/IGnssBatchingCallback.hal
+++ b/gnss/1.0/IGnssBatchingCallback.hal
@@ -16,9 +16,9 @@
 
 package android.hardware.gnss@1.0;
 
-/* The callback interface to report measurements from the HAL. */
+/** The callback interface to report measurements from the HAL. */
 interface IGnssBatchingCallback {
-    /*
+    /**
      * Called when a batch of locations is output, by various means, including
      * a flush request, as well as the buffer becoming full (if appropriate option
      * is set.)