Move ContentPager to contentpager/ directory (instead of content/).

Test: Ran existing tests.
Change-Id: Iaf282389b95027f07c6a1dc490f607ca123f7f29
diff --git a/settings.gradle b/settings.gradle
index 0ee2987..8a8c5a2 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -97,7 +97,7 @@
 includeProject(":collection:collection", "collection/collection")
 includeProject(":collection:collection-ktx", "collection/collection-ktx")
 includeProject(":concurrent:concurrent-futures", "concurrent/futures")
-includeProject(":contentpager", "content")
+includeProject(":contentpager", "contentpager")
 includeProject(":coordinatorlayout", "coordinatorlayout")
 includeProject(":core:core", "core/core")
 includeProject(":core:core-ktx", "core/core-ktx")