Fix functions with empty params (#19647)

* Fix functions with empty params

* Found a bunch more

keyboards/gboards/engine/engine.c

@@ -53,7 +53,7 @@ bool   inMouse = false;
 int8_t mousePress;
 
 // All processing done at chordUp goes through here
-void processKeysUp() {
+void processKeysUp(void) {
     // Check for mousekeys, this is release
 #ifdef MOUSEKEY_ENABLE
     if (inMouse) {
@@ -372,7 +372,7 @@ void saveState(C_SIZE cleanChord) {
     pChordIndex = chordIndex;
     for (int i = 0; i < 32; i++) pChordState[i] = chordState[i];
 }
-void restoreState() {
+void restoreState(void) {
     cChord     = pChord;
     chordIndex = pChordIndex;
     for (int i = 0; i < 32; i++) chordState[i] = pChordState[i];