Support Lib Preference framework

Change-Id: I4ada1206e0d7dab9cd39d19d195adef19feef49a
diff --git a/settings.gradle b/settings.gradle
index 7e907c2..4a3f4a4 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -22,6 +22,12 @@
 include ':support-cardview-v7'
 project(':support-cardview-v7').projectDir = new File(rootDir, 'v7/cardview')
 
+include ':support-preference-v7'
+project(':support-preference-v7').projectDir = new File(rootDir, 'v7/preference')
+
+include ':support-preference-v14'
+project(':support-preference-v14').projectDir = new File(rootDir, 'v14/preference')
+
 include ':support-v13'
 project(':support-v13').projectDir = new File(rootDir, 'v13')