Update referrals to Android 5.0 with Android 5.1

Bug: 19384369

Change-Id: I4c98af3ab03e56aae360ab008e87819b4f02a666
diff --git a/src/compatibility/5.1/versions.jd b/src/compatibility/5.1/versions.jd
index 78a11cb..52a7f90 100644
--- a/src/compatibility/5.1/versions.jd
+++ b/src/compatibility/5.1/versions.jd
@@ -1,8 +1,8 @@
-page.title=Permitted Version Strings for Android 5.0
+page.title=Permitted Version Strings for Android 5.1
 @jd:body
 
 <p>As described in Section 3.2.2 of the <a
-href="/compatibility/android-5.0-cdd.pdf">Android 5.0 Compatibility Definition</a>,
+href="/compatibility/android-5.1-cdd.pdf">Android 5.1 Compatibility Definition</a>,
 only certain strings are allowable for the system property
 <code>android.os.Build.VERSION.RELEASE</code>. The reason for this is that
 applications and web sites may rely on predictable values for this string, and
@@ -12,7 +12,7 @@
 but not change any API behavior, such releases may not be accompanied by a new
 Compatibility Definition Document. This page lists the versions that are
 allowable by an Android 5.0-based system. The only permitted values for
-<code>android.os.Build.VERSION.RELEASE</code> for Android 5.0 are:</p>
+<code>android.os.Build.VERSION.RELEASE</code> for Android 5.1 are:</p>
 <ul>
-<li>5.0</li>
+<li>5.1</li>
 </ul>