Initial wallpaper settings screens.

app/src/main/java/org/thoughtcrime/securesms/components/InsetAwareConstraintLayout.java

@@ -0,0 +1,47 @@
+package org.thoughtcrime.securesms.components;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.constraintlayout.widget.ConstraintLayout;
+import androidx.constraintlayout.widget.Guideline;
+
+import org.thoughtcrime.securesms.R;
+
+public class InsetAwareConstraintLayout extends ConstraintLayout {
+
+  public InsetAwareConstraintLayout(@NonNull Context context) {
+    super(context);
+  }
+
+  public InsetAwareConstraintLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
+    super(context, attrs);
+  }
+
+  public InsetAwareConstraintLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+    super(context, attrs, defStyleAttr);
+  }
+
+  public InsetAwareConstraintLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+    super(context, attrs, defStyleAttr, defStyleRes);
+  }
+
+  @Override
+  protected boolean fitSystemWindows(Rect insets) {
+    Guideline statusBarGuideline     = findViewById(R.id.status_bar_guideline);
+    Guideline navigationBarGuideline = findViewById(R.id.navigation_bar_guideline);
+
+    if (statusBarGuideline != null) {
+      statusBarGuideline.setGuidelineBegin(insets.top);
+    }
+
+    if (navigationBarGuideline != null) {
+      navigationBarGuideline.setGuidelineEnd(insets.bottom);
+    }
+
+    return true;
+  }
+}