Introduce KeyboardStateManager to maintain keyboardstate as show or hide.

- Add a feature flag for IME Latency logging.

- Removed mShowImeAfterFirstLayout from ExtendedEditText.

   http://ag/1414509 added `mShowImeAfterFirstLayout`and cl description
   says "Show IME when search query != null after rotation".

   I verified the behavior by turning on "Allow home screen rotation".
   Keyboard is not getting dismissed on rotation in AA+ screen in a-z list
   or even in the search screen.
   Video : https://drive.google.com/file/d/1BWUTrW9OSEo6ojErj8INMwjFCPArVD4B/view?usp=sharing&resourcekey=0-SXTcKyUw1wCSi8Bm37ktow

Bug: 240192346
Test: Manual.

Verified by setting `ENABLE_KEYBOARD_TRANSITION_SYNC` to false and for
following usecases.

- All apps entry with ime enabled, scrolling a-z list to hide keyboard
- Folder name change - showing and dismissing keyboard
- Toast entry from Allapps and QSB - showing and dismissing keyboard

Change-Id: I1a6b5759b8e71e77744f58677b6d1b73e2f633e8

src/com/android/launcher3/logging/KeyboardStateManager.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.logging;
+
+import static com.android.launcher3.logging.KeyboardStateManager.KeyboardState.NO_IME_ACTION;
+
+import android.os.SystemClock;
+
+/**
+ * Class to maintain keyboard states.
+ */
+public class KeyboardStateManager {
+    private long mUpdatedTime;
+
+    public enum KeyboardState {
+        NO_IME_ACTION,
+        SHOW,
+        HIDE,
+    }
+
+    private KeyboardState mKeyboardState;
+
+    public KeyboardStateManager() {
+        mKeyboardState = NO_IME_ACTION;
+    }
+
+    /**
+     * Returns time when keyboard state was updated.
+     */
+    public long getLastUpdatedTime() {
+        return mUpdatedTime;
+    }
+
+    /**
+     * Returns current keyboard state.
+     */
+    public KeyboardState getKeyboardState() {
+        return mKeyboardState;
+    }
+
+    /**
+     * Setter method to set keyboard state.
+     */
+    public void setKeyboardState(KeyboardState keyboardState) {
+        mUpdatedTime = SystemClock.elapsedRealtime();
+        mKeyboardState = keyboardState;
+    }
+}