camera: fix `-Wformat` compiler warnings

Test: add `USE_CAMERA_V4L2_HAL := true` to
      hardware/libhardware/modules/camera/3_4/Android.mk and build
      mmm hardware/libhardware/modules/camera/3_4
Change-Id: Ib1d1fc2de98436dd7e9d15ab324789725bb2002e
Signed-off-by: Sergii Piatakov <sergii.piatakov@globallogic.com>
diff --git a/modules/camera/3_4/camera.cpp b/modules/camera/3_4/camera.cpp
index 01236f3..35054a0 100644
--- a/modules/camera/3_4/camera.cpp
+++ b/modules/camera/3_4/camera.cpp
@@ -344,7 +344,7 @@
 
     // Pre-process output buffers.
     if (request->output_buffers.size() <= 0) {
-        ALOGE("%s:%d: Invalid number of output buffers: %d", __func__, mId,
+        ALOGE("%s:%d: Invalid number of output buffers: %zu", __func__, mId,
               request->output_buffers.size());
         return -EINVAL;
     }
@@ -434,7 +434,7 @@
         completeRequestWithError(request);
     }
 
-    ALOGV("%s:%d: Flushed %u requests.", __func__, mId, requests.size());
+    ALOGV("%s:%d: Flushed %zu requests.", __func__, mId, requests.size());
 
     // Call down into the device flushing.
     return flushBuffers();