Restrict reset password service to O and later.

It is a demo for an API added in O so should not run on older versions.

Bug: 38447085
Change-Id: I52ef60a7fba118329fd5040ff5347c329c125b9d

Author: AndrewScull

app/src/main/AndroidManifest.xml

@@ -137,14 +137,16 @@
         </receiver>
 
         <receiver android:name=".policy.resetpassword.ResetPasswordService$LockedBootCompletedReceiver"
-            android:directBootAware="true" >
+                android:enabled="@bool/is_o_or_later"
+                android:directBootAware="true" >
             <intent-filter>
                 <action android:name="android.intent.action.LOCKED_BOOT_COMPLETED" />
             </intent-filter>
         </receiver>
 
         <service android:name=".policy.resetpassword.ResetPasswordService"
-            android:directBootAware="true" >
+                android:enabled="@bool/is_o_or_later"
+                android:directBootAware="true" >
         </service>
 
         <provider