InputService: only use sendKeyEvent on API level 34 and newer

Level 33 does not have https://cs.android.com/android/_/android/platform/frameworks/base/+/89025ff06e71f9e37b4bb6f94e43ff50f246d581
applied which fixes a NPE.

See https://cs.android.com/android/platform/superproject/+/android13-release:frameworks/base/core/java/android/accessibilityservice/InputMethod.java
vs
https://cs.android.com/android/platform/superproject/+/android14-release:frameworks/base/core/java/android/accessibilityservice/InputMethod.java

re #208

README.md

@@ -19,7 +19,7 @@ If you have a general question, it's best to [ask in the community chat](https:/
 
 * Network export of device frame buffer with optional server-side scaling.
 * Injection of remote pointer and basic keyboard events (Latin-1 charset plus some special keys,
-  supporting any kind of UI widget on Android 13 and newer, on older devices into EditText widgets only).
+  supporting any kind of UI widget on Android 14 and newer, on older devices into EditText widgets only).
 * Handling of client-to-server text copy & paste. Note that server-to-client copy & paste only works
   automatically for text selected in editable text fields or manually by sharing text to droidVNC-NG
   via Android's Share-To functionality.

app/src/main/java/net/christianbeier/droidvnc_ng/InputService.java

@@ -381,8 +381,11 @@ public static void onKeyEvent(int down, long keysym, long client) {
 			/*
 				API 33+ way of sending key events. This is preferred there as it also works with non-
 				AccessibilityNode-widgets.
+				We are only using this on API level 34+ though as level 33 does not have
+				https://cs.android.com/android/_/android/platform/frameworks/base/+/89025ff06e71f9e37b4bb6f94e43ff50f246d581
+				applied.
 			 */
-			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+			if (Build.VERSION.SDK_INT >= 34) {
 				// If this fails, it falls back to the usual AccessibilityNodeInfo approach
 				try {
 					/*