camera 3_4: Fix compilation errors

Compile Error:
hardware/libhardware/modules/camera/3_4/camera.cpp:502:9: error: non-constant-expression cannot be narrowed from type 'std::__1::vector<camera3_stream_buffer, std::__1::allocator<camera3_stream_buffer> >::size_type' (aka 'unsigned long') to 'uint32_t' (aka 'unsigned int') in initializer list [-Wc++11-narrowing]
        request->output_buffers.size(),
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Test: Add to device.mk
        USE_CAMERA_V4L2_HAL := true
        PRODUCT_PACKAGES += camera.v4l2
      mma

Change-Id: Ia6bbd6bac06540214d2c6167a8826f3f4c946e57
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/modules/camera/3_4/camera.cpp b/modules/camera/3_4/camera.cpp
index 0f9e378..79dca0b 100644
--- a/modules/camera/3_4/camera.cpp
+++ b/modules/camera/3_4/camera.cpp
@@ -500,7 +500,7 @@
     camera3_capture_result_t result {
         request->frame_number,
         request->settings.getAndLock(),
-        request->output_buffers.size(),
+        static_cast<uint32_t>(request->output_buffers.size()),
         request->output_buffers.data(),
         request->input_buffer.get(),
         1  // Total result; only 1 part.