move leanback preference-leanback to top level

Bug: NA
Test: gradlew updateApi gradlew leanback:connectedCheck
Change-Id: Ie8cce1e7ef6239a567e02ec917db652e25ee0611
diff --git a/settings.gradle b/settings.gradle
index 95f5b06..92ffe30 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -53,13 +53,13 @@
 project(':preference-v14').projectDir = new File(rootDir, 'v14/preference')
 
 include ':preference-leanback-v17'
-project(':preference-leanback-v17').projectDir = new File(rootDir, 'v17/preference-leanback')
+project(':preference-leanback-v17').projectDir = new File(rootDir, 'preference-leanback')
 
 include ':support-v13'
 project(':support-v13').projectDir = new File(rootDir, 'v13')
 
 include ':leanback-v17'
-project(':leanback-v17').projectDir = new File(rootDir, 'v17/leanback')
+project(':leanback-v17').projectDir = new File(rootDir, 'leanback')
 
 include ':design'
 project(':design').projectDir = new File(rootDir, 'design')