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/Android.bp b/packages/SettingsLib/Android.bp
index 36ee813..caa928f 100644
--- a/packages/SettingsLib/Android.bp
+++ b/packages/SettingsLib/Android.bp
@@ -21,6 +21,7 @@
         "SettingsLibActionButtonsPreference",
         "SettingsLibEntityHeaderWidgets",
         "SettingsLibBarChartPreference",
+        "SettingsLibProgressBar",
     ],
 
     // ANDROIDMK TRANSLATION ERROR: unsupported assignment to LOCAL_SHARED_JAVA_LIBRARIES