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

rs/java/android/renderscript/ProgramStore.java

@@ -17,6 +17,7 @@
 package android.renderscript;
 
 import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
 
 
 /**
@@ -308,7 +309,7 @@ public class ProgramStore extends BaseObj {
     *
     *  @param rs Context to which the program will belong.
     **/
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static ProgramStore BLEND_ALPHA_DEPTH_NONE(RenderScript rs) {
         if(rs.mProgramStore_BLEND_ALPHA_DEPTH_NO_DEPTH == null) {
             ProgramStore.Builder builder = new ProgramStore.Builder(rs);