Add -webcam commandline option to control webcam emulation

-webcam name=<name>[,dir=<direction>] options controls web cameras to use for emulation.

Change-Id: I961fd399c7e041541adda040dd24f194cc383cb9
diff --git a/android/camera/camera-capture-windows.c b/android/camera/camera-capture-windows.c
index e5120ab..0fb172e 100755
--- a/android/camera/camera-capture-windows.c
+++ b/android/camera/camera-capture-windows.c
@@ -504,7 +504,11 @@
                  * but the actual numbers may vary). */
                 cis[found].frame_sizes = (CameraFrameDim*)malloc(sizeof(CameraFrameDim));
                 if (cis[found].frame_sizes != NULL) {
+                    char disp_name[24];
+                    sprintf(disp_name, "webcam%d", found);
+                    cis[found].display_name = ASTRDUP(disp_name);
                     cis[found].device_name = ASTRDUP(name);
+                    cis[found].direction = ASTRDUP("front");
                     cis[found].inp_channel = inp_channel;
                     cis[found].frame_sizes->width = wcd->frame_bitmap->bmiHeader.biWidth;
                     cis[found].frame_sizes->height = wcd->frame_bitmap->bmiHeader.biHeight;