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).

wpilibOldCommands/src/main/native/cpp/buttons/Trigger.cpp

@@ -33,7 +33,9 @@ Trigger& Trigger::operator=(Trigger&& rhs) {
   return *this;
 }
 
-bool Trigger::Grab() { return Get() || m_sendablePressed; }
+bool Trigger::Grab() {
+  return Get() || m_sendablePressed;
+}
 
 void Trigger::WhenActive(Command* command) {
   auto pbs = new PressedButtonScheduler(Grab(), this, command);