Update to gradle 3.0 style dependencies.

Use api, androidTestImplementation, and testImplementation
when specifying project dependencies.

Test: ./gradlew assemble
Change-Id: I014e51be73f3f7c086c5739c4bdbd27145a834bc
diff --git a/v17/preference-leanback/build.gradle b/v17/preference-leanback/build.gradle
index a849a8d..4222f5b 100644
--- a/v17/preference-leanback/build.gradle
+++ b/v17/preference-leanback/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: android.support.SupportLibraryPlugin
 
 dependencies {
-    compile project(':support-v4')
-    compile project(':support-appcompat-v7')
-    compile project(':support-recyclerview-v7')
-    compile project(':support-preference-v7')
-    compile project(':support-preference-v14')
-    compile project(':support-leanback-v17')
+    api project(':support-v4')
+    api project(':support-appcompat-v7')
+    api project(':support-recyclerview-v7')
+    api project(':support-preference-v7')
+    api project(':support-preference-v14')
+    api project(':support-leanback-v17')
 }
 
 android {