modules: camera: Write back stream parameters

max_buffers and usage are read by the framework inside the struct used
to pass the stream configuration parameters;  scribble our new
calculated values whever they are updated internally.

Adds logging to stream creation method (reuse/new).

Change-Id: I04e12880820571900f2ae80c27100f8aedcf9d02
diff --git a/modules/camera/Camera.cpp b/modules/camera/Camera.cpp
index 42e5cdb..137c5f6 100644
--- a/modules/camera/Camera.cpp
+++ b/modules/camera/Camera.cpp
@@ -326,10 +326,13 @@
     // Fill new stream array with reused streams and new streams
     for (unsigned int i = 0; i < stream_config->num_streams; i++) {
         astream = stream_config->streams[i];
-        if (astream->max_buffers > 0)
+        if (astream->max_buffers > 0) {
+            ALOGV("%s:%d: Reusing stream %d", __func__, mId, i);
             newStreams[i] = reuseStream(astream);
-        else
+        } else {
+            ALOGV("%s:%d: Creating new stream %d", __func__, mId, i);
             newStreams[i] = new Stream(mId, astream);
+        }
 
         if (newStreams[i] == NULL) {
             ALOGE("%s:%d: Error processing stream %d", __func__, mId, i);