Add maxTargetSdk restriction to unused APIs.

These are APIs that have @UnsupportedAppUsage but for which we don't
have any evidence of them currently being used, so should be safe to
remove from the unsupported list.

This is a resubmit of ag/12929664 with some APIs excluded that caused
test failures; see bugs 171886397, 171888296, 171864568.

APIs excluded:
Landroid/bluetooth/le/ScanRecord;->parseFromBytes([B)Landroid/bluetooth/le/ScanRecord;
Landroid/os/Process;->myPpid()I
Landroid/os/SharedMemory;->getFd()I
Landroid/hardware/input/InputManager;->INJECT_INPUT_EVENT_MODE_WAIT_FOR_FINISH:I

Bug: 170729553
Test: Treehugger
Change-Id: I8285daa8530260251ecad6f3f38f98e263629ca7
diff --git a/rs/java/android/renderscript/Font.java b/rs/java/android/renderscript/Font.java
index df9d801..e47ec4b 100644
--- a/rs/java/android/renderscript/Font.java
+++ b/rs/java/android/renderscript/Font.java
@@ -19,6 +19,7 @@
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.res.AssetManager;
 import android.content.res.Resources;
+import android.os.Build;
 import android.os.Environment;
 
 import java.io.File;
@@ -237,7 +238,7 @@
      *
      * Returns default font if no match could be found.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     static public Font create(RenderScript rs, Resources res, String familyName, Style fontStyle, float pointSize) {
         String fileName = getFontFileName(familyName, fontStyle);
         String fontPath = Environment.getRootDirectory().getAbsolutePath();