Adding shifting mode to BottomNavigationView.

This change adds a new mode to BottomNavigationView that
follow the https://material.google.com/components/bottom-navigation.html
spec.

Bug: 27675079

Change-Id: I868bc3c8cedd39c4e5a66c3c0ffbadff93bdf329
diff --git a/design/build.gradle b/design/build.gradle
index 4407ba9..8ae45d7 100644
--- a/design/build.gradle
+++ b/design/build.gradle
@@ -6,6 +6,7 @@
     compile project(':support-v4')
     compile project(':support-appcompat-v7')
     compile project(':support-recyclerview-v7')
+    compile project(':support-transition')
 
     androidTestCompile ("com.android.support.test:runner:${project.rootProject.ext.testRunnerVersion}") {
         exclude module: 'support-annotations'