Clean up KeyEvent JNI APIs

Directly return a KeyEvent from KeyEvent_toNative, and change the
KeyEvent parameter from a pointer to a reference in KeyEvent_fromNative.

Bug: 279927189
Bug: 245989146
Test: Presubmit
Change-Id: I9c98700ea4645c6c4cb975fabfa25d1ff959bfc3
diff --git a/native/android/input.cpp b/native/android/input.cpp
index 1bff97d..64e8efe 100644
--- a/native/android/input.cpp
+++ b/native/android/input.cpp
@@ -87,11 +87,8 @@
 
 const AInputEvent* AKeyEvent_fromJava(JNIEnv* env, jobject keyEvent) {
     std::unique_ptr<KeyEvent> event = std::make_unique<KeyEvent>();
-    android::status_t ret = android::android_view_KeyEvent_toNative(env, keyEvent, event.get());
-    if (ret == android::OK) {
-        return event.release();
-    }
-    return nullptr;
+    *event = android::android_view_KeyEvent_toNative(env, keyEvent);
+    return event.release();
 }
 
 int64_t AKeyEvent_getEventTime(const AInputEvent* key_event) {