Add preference-v17 to gradle build

Change-Id: Iaaec6eb8bdc9652f4f6415ce69b40d6af36a138b
diff --git a/settings.gradle b/settings.gradle
index 4a3f4a4..866ac21 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -28,6 +28,9 @@
 include ':support-preference-v14'
 project(':support-preference-v14').projectDir = new File(rootDir, 'v14/preference')
 
+include ':support-preference-v17'
+project(':support-preference-v17').projectDir = new File(rootDir, 'v17/preference')
+
 include ':support-v13'
 project(':support-v13').projectDir = new File(rootDir, 'v13')