GameActivity PATCH: Don't read unicode via getUnicodeChar

The `unicodeChar` in `GameActivityKeyEvent` wasn't being exposed by
`android-activity` because we couldn't expose the unicode character in
the same way with the native-activity backend - due to how events are
received via an `InputQueue` that doesn't expose the underlying Java
references for the key events.

Now that we have a consistent way of supporting unicode character
mapping via `KeyCharacterMap` bindings it's redundant for the
`GameActivity` backend to call `getUnicodeChar` automatically for
each key press.

Author: rib

android-activity/game-activity-csrc/game-activity/GameActivityEvents.cpp

@@ -266,7 +266,7 @@ static struct {
   jmethodID getRepeatCount;
   jmethodID getKeyCode;
   jmethodID getScanCode;
-  jmethodID getUnicodeChar;
+  // jmethodID getUnicodeChar;
 } gKeyEventClassInfo;
 
 static void initKeyEvents(JNIEnv *env) {
@@ -297,8 +297,8 @@ static void initKeyEvents(JNIEnv *env) {
       env->GetMethodID(keyEventClass, "getKeyCode", "()I");
   gKeyEventClassInfo.getScanCode =
       env->GetMethodID(keyEventClass, "getScanCode", "()I");
-  gKeyEventClassInfo.getUnicodeChar =
-      env->GetMethodID(keyEventClass, "getUnicodeChar", "()I");
+  //gKeyEventClassInfo.getUnicodeChar =
+      //env->GetMethodID(keyEventClass, "getUnicodeChar", "()I");
 }
 
 extern "C" void GameActivityKeyEvent_fromJava(JNIEnv *env, jobject keyEvent,
@@ -323,9 +323,10 @@ extern "C" void GameActivityKeyEvent_fromJava(JNIEnv *env, jobject keyEvent,
       /*keyCode=*/
       env->CallIntMethod(keyEvent, gKeyEventClassInfo.getKeyCode),
       /*scanCode=*/
-      env->CallIntMethod(keyEvent, gKeyEventClassInfo.getScanCode),
+      env->CallIntMethod(keyEvent, gKeyEventClassInfo.getScanCode)
       /*unicodeChar=*/
-      env->CallIntMethod(keyEvent, gKeyEventClassInfo.getUnicodeChar)};
+      // env->CallIntMethod(keyEvent, gKeyEventClassInfo.getUnicodeChar)
+  };
 }
 
 extern "C" void GameActivityEventsInit(JNIEnv *env) {

android-activity/game-activity-csrc/game-activity/GameActivityEvents.h

@@ -300,7 +300,7 @@ typedef struct GameActivityKeyEvent {
   int32_t repeatCount;
   int32_t keyCode;
   int32_t scanCode;
-  int32_t unicodeChar;
+  // int32_t unicodeChar;
 } GameActivityKeyEvent;
 
 #ifdef __cplusplus