camera: Fix availableMaxDigitalZoom property to be float

Bug: 8840802
Change-Id: I80e0d0fc2b5145597b09445f166bc998093ef603
diff --git a/camera/EmulatedFakeCamera3.cpp b/camera/EmulatedFakeCamera3.cpp
index b82c4c0..adcde88 100644
--- a/camera/EmulatedFakeCamera3.cpp
+++ b/camera/EmulatedFakeCamera3.cpp
@@ -1150,7 +1150,7 @@
             (int64_t*)kAvailableJpegMinDurations,
             sizeof(kAvailableJpegMinDurations)/sizeof(uint64_t));
 
-    static const int32_t maxZoom = 10;
+    static const float maxZoom = 10;
     info.update(ANDROID_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM,
             &maxZoom, 1);