Docs: Add "admin" to samples categories

Contains samples for device administration APIs.

Issue: 18544051
Change-Id: I8e157ba163848ac0356f2669a9cadd0f76b4ae9a
diff --git a/Android.mk b/Android.mk
index 75e32c1..da98b19 100644
--- a/Android.mk
+++ b/Android.mk
@@ -727,7 +727,8 @@
 # Whitelist of valid groups, used for default TOC grouping. Each sample must
 # belong to one (and only one) group. Assign samples to groups by setting
 # a sample.group var to one of these groups in the sample's _index.jd.
-sample_groups := -samplegroup Background \
+sample_groups := -samplegroup Admin \
+                 -samplegroup Background \
                  -samplegroup Connectivity \
                  -samplegroup Content \
                  -samplegroup Input \
diff --git a/docs/html/samples/admin.jd b/docs/html/samples/admin.jd
new file mode 100644
index 0000000..c6637d8
--- /dev/null
+++ b/docs/html/samples/admin.jd
@@ -0,0 +1,11 @@
+page.title=Admin
+@jd:body
+
+
+<div id="samples" class="admin">
+</div>
+
+
+<script>
+  $(document).ready(showSamples);
+</script>