禁止屏幕旋转隐藏右下角手动旋转按钮

项目中，禁止屏幕自动旋转。但是设备横竖屏物理旋转，因为重力感应器原因，切换后，竖屏方向时，右下角位置（底部导航栏位置）出现手动旋转屏幕按钮，点击后会旋转，这个地方在什么位置呢？

一图标如下

二怎样隐藏该图标显示呢

他不在launcher模块中，在framework/base/SystemUI/下

packages/SystemUI/src/com/android/systemui/statusbar/phone/RotationButtonController.java

//packages/SystemUI/src/com/android/systemui/statusbar/phone/RotationButtonController.java



    void setRotateSuggestionButtonState(final boolean visible, final boolean force) {
        // At any point the the button can become invisible because an a11y service became active.
        // Similarly, a call to make the button visible may be rejected because an a11y service is
        // active. Must account for this.
        // Rerun a show animation to indicate change but don't rerun a hide animation
       + if (true) {
       +    android.util.Log.d("RotationButtonController", " setRotateSuggestionButtonState return, rotation button not need show-----");
        +    return;
       + }
            android.util.Log.d("RotationButtonController", " setRotateSuggestionButtonState run first---");
        if (!visible && !mRotationButton.isVisible()) return;
        final View view = mRotationButton.getCurrentView();
        if (view == null) return;
        final KeyButtonDrawable currentDrawable = mRotationButton.getImageDrawable();
        if (currentDrawable == null) return;
        // Clear any pending suggestion flag as it has either been nullified or is being shown
        mPendingRotationSuggestion = false;

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