Cleanup API checks for P, Q, and R.

Test: Build with gradle
Flag: NA
Change-Id: I3ef17090741d14bebd76cf09cf3dc5ac4f11e686

quickstep/src/com/android/launcher3/appprediction/PredictionRowView.java

@@ -16,10 +16,8 @@
 
 package com.android.launcher3.appprediction;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Canvas;
-import android.os.Build;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -50,7 +48,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
-@TargetApi(Build.VERSION_CODES.P)
 public class PredictionRowView<T extends Context & ActivityContext>
         extends LinearLayout implements OnDeviceProfileChangeListener, FloatingHeaderRow {