Upgrade targetSdkVersion to 34

This API version update doesn't seem to affect this launcher that much.
Only differences were signatures of these 2 methods (onFling and onDraw),
but no other changes really affect this app from these lists:
- https://developer.android.com/about/versions/14/behavior-changes-all
- https://developer.android.com/about/versions/14/behavior-changes-14

Font scaling can go up to 200% now and it doesn't break functionality either.

app/build.gradle

@@ -10,12 +10,12 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 33
+    compileSdkVersion 34
 
     defaultConfig {
         applicationId "com.simplemobiletools.launcher"
         minSdkVersion 26
-        targetSdkVersion 33
+        targetSdkVersion 34
         versionCode 8
         versionName "5.0.6"
         setProperty("archivesBaseName", "launcher")

app/src/main/kotlin/com/simplemobiletools/launcher/activities/MainActivity.kt

@@ -667,7 +667,7 @@ class MainActivity : SimpleActivity(), FlingListener {
             return super.onSingleTapUp(event)
         }
 
-        override fun onFling(event1: MotionEvent, event2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
+        override fun onFling(event1: MotionEvent?, event2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
             // ignore fling events just after releasing an icon from dragging
             if (System.currentTimeMillis() - mLastUpEvent < 500L) {
                 return true

app/src/main/kotlin/com/simplemobiletools/launcher/views/HomeScreenGrid.kt

@@ -673,11 +673,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
     private fun getFakeHeight() = height - sideMargins.top - sideMargins.bottom
 
     @SuppressLint("DrawAllocation")
-    override fun onDraw(canvas: Canvas?) {
-        if (canvas == null) {
-            return
-        }
-
+    override fun onDraw(canvas: Canvas) {
         super.onDraw(canvas)
         if (cellXCoords.isEmpty()) {
             fillCellSizes()