Camera2: Increase zoom steps.

10 is too low for smooth zoom; increase number to improve smoothness.

Bug: 7120794
Change-Id: I178cd3890ef37beeff97cadb9e92ceab6d2cad06
diff --git a/services/camera/libcameraservice/camera2/Parameters.h b/services/camera/libcameraservice/camera2/Parameters.h
index e71d086..509cc85 100644
--- a/services/camera/libcameraservice/camera2/Parameters.h
+++ b/services/camera/libcameraservice/camera2/Parameters.h
@@ -141,7 +141,7 @@
     } state;
 
     // Number of zoom steps to simulate
-    static const unsigned int NUM_ZOOM_STEPS = 10;
+    static const unsigned int NUM_ZOOM_STEPS = 30;
 
     // Full static camera info, object owned by someone else, such as
     // Camera2Device.