Add horizontal progress bar SettingsLib library.

Move the logic for a horizontal progress bar into its own library in
SettingsLib.

Bug: 123538370
Test: Code using this library still works.
Change-Id: I700c5e481bf32077e19e606d797e5b698b2cc33a
diff --git a/packages/SettingsLib/ProgressBar/Android.bp b/packages/SettingsLib/ProgressBar/Android.bp
new file mode 100644
index 0000000..eae21d8
--- /dev/null
+++ b/packages/SettingsLib/ProgressBar/Android.bp
@@ -0,0 +1,9 @@
+android_library {
+    name: "SettingsLibProgressBar",
+
+    srcs: ["src/**/*.java"],
+    resource_dirs: ["res"],
+
+    sdk_version: "system_current",
+    min_sdk_version: "21",
+}
\ No newline at end of file