general: Use deducation guides for std::lock_guard and std::unique_lock

Since C++17, the introduction of deduction guides for locking facilities
means that we no longer need to hardcode the mutex type into the locks
themselves, making it easier to switch mutex types, should it ever be
necessary in the future.

src/input_common/udp/udp.cpp

@@ -15,7 +15,7 @@ class UDPTouchDevice final : public Input::TouchDevice {
 public:
     explicit UDPTouchDevice(std::shared_ptr<DeviceStatus> status_) : status(std::move(status_)) {}
     std::tuple<float, float, bool> GetStatus() const {
-        std::lock_guard<std::mutex> guard(status->update_mutex);
+        std::lock_guard guard(status->update_mutex);
         return status->touch_status;
     }
 
@@ -27,7 +27,7 @@ class UDPMotionDevice final : public Input::MotionDevice {
 public:
     explicit UDPMotionDevice(std::shared_ptr<DeviceStatus> status_) : status(std::move(status_)) {}
     std::tuple<Common::Vec3<float>, Common::Vec3<float>> GetStatus() const {
-        std::lock_guard<std::mutex> guard(status->update_mutex);
+        std::lock_guard guard(status->update_mutex);
         return status->motion_status;
     }
 
@@ -41,7 +41,7 @@ public:
 
     std::unique_ptr<Input::TouchDevice> Create(const Common::ParamPackage& params) override {
         {
-            std::lock_guard<std::mutex> guard(status->update_mutex);
+            std::lock_guard guard(status->update_mutex);
             status->touch_calibration.emplace();
             // These default values work well for DS4 but probably not other touch inputs
             status->touch_calibration->min_x = params.Get("min_x", 100);