Create a collapsing toolbar based activity

On Android S, each of subsetting pages will have a collapsing toolbar to
enlarge its title. However, there are many different pages from
differennt apps. So we extracted a base activity with collapsing toolbar
layout so it is easier to enbale a collapsing toolbar in their own
pages.

Bug: 179380824
Test: visual verified
Change-Id: Ic505d65320081589d1e1b5eb4bd2af7a06e60d39
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/Android.bp b/packages/SettingsLib/CollapsingToolbarBaseActivity/Android.bp
new file mode 100644
index 0000000..c23ff05
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/Android.bp
@@ -0,0 +1,14 @@
+android_library {
+    name: "SettingsLibCollapsingToolbarBaseActivity",
+
+    srcs: ["src/**/*.java"],
+    resource_dirs: ["res"],
+
+    static_libs: [
+        "androidx.annotation_annotation",
+        "androidx.core_core",
+        "com.google.android.material_material",
+    ],
+    sdk_version: "system_current",
+    min_sdk_version: "21",
+}