[CQ] Declaration Redundancy: remove unnecessary final method modifiers (#7999)

Methods in `final` classes don't need the extra annotation.

Author: pq

flutter-idea/src/io/flutter/module/settings/InitializeOnceBoolValueProperty.java

@@ -45,15 +45,15 @@ protected void setDirectly(@NotNull Boolean value) {
     myValue = value;
   }
 
-  public final void initialize(@NotNull Boolean value) {
+  public void initialize(@NotNull Boolean value) {
     if (isSet) {
       return;
     }
     setDirectly(value);
     isSet = true;
   }
 
-  public final void set(@NotNull Boolean value) {
+  public void set(@NotNull Boolean value) {
     if (!isValueEqual(value)) {
       //setNotificationsEnabled(false);
       setDirectly(value);
@@ -71,12 +71,12 @@ public String toString() {
     return get().toString();
   }
 
-  public final void addConstraint(Object constraint) {
+  public void addConstraint(Object constraint) {
     // This is only a partial implementation of the Android Studio class. If someone tries to use constraints more implementation is needed.
     throw new Error("constraints not supported");
   }
 
-  public final void addListener(Object listener) {
+  public void addListener(Object listener) {
     // This is only a partial implementation of the Android Studio class. If someone tries to use listeners more implementation is needed.
     throw new Error("listeners not supported");
   }