Add braces to C++ single-line loops and conditionals (NFC) (#2973)

This makes code easier to read and more consistent between C++ and Java.
Also update clang-format settings to always add a line break (even if no braces are used).

cscore/src/main/native/cpp/CvSinkImpl.cpp

@@ -30,16 +30,22 @@ CvSinkImpl::CvSinkImpl(const wpi::Twine& name, wpi::Logger& logger,
                        std::function<void(uint64_t time)> processFrame)
     : SinkImpl{name, logger, notifier, telemetry} {}
 
-CvSinkImpl::~CvSinkImpl() { Stop(); }
+CvSinkImpl::~CvSinkImpl() {
+  Stop();
+}
 
 void CvSinkImpl::Stop() {
   m_active = false;
 
   // wake up any waiters by forcing an empty frame to be sent
-  if (auto source = GetSource()) source->Wakeup();
+  if (auto source = GetSource()) {
+    source->Wakeup();
+  }
 
   // join thread
-  if (m_thread.joinable()) m_thread.join();
+  if (m_thread.joinable()) {
+    m_thread.join();
+  }
 }
 
 uint64_t CvSinkImpl::GrabFrame(cv::Mat& image) {
@@ -106,7 +112,9 @@ void CvSinkImpl::ThreadMain() {
     }
     SDEBUG4("waiting for frame");
     Frame frame = source->GetNextFrame();  // blocks
-    if (!m_active) break;
+    if (!m_active) {
+      break;
+    }
     if (!frame) {
       // Bad frame; sleep for 10 ms so we don't consume all processor time.
       std::this_thread::sleep_for(std::chrono::milliseconds(10));
@@ -240,7 +248,9 @@ uint64_t CS_GrabSinkFrameTimeoutCpp(CS_Sink sink, cv::Mat* image,
 char* CS_GetSinkError(CS_Sink sink, CS_Status* status) {
   wpi::SmallString<128> buf;
   auto str = cs::GetSinkError(sink, buf, status);
-  if (*status != 0) return nullptr;
+  if (*status != 0) {
+    return nullptr;
+  }
   return cs::ConvertToC(str);
 }