Create SpaPrivileged Lib

If a functionality cannot be put into Spa Lib because one of:
- Using private API
- Depends on SettingsLib

Then the functionality can be put into the SpaPrivileged Lib.

Add AppInfo widget as example.

Bug: 235727273
Test: Manual with Test App
Change-Id: I5e711e0a9067314819c7f4ba86764f25d0060239
diff --git a/packages/SettingsLib/SpaPrivileged/OWNERS b/packages/SettingsLib/SpaPrivileged/OWNERS
new file mode 100644
index 0000000..9256ca5
--- /dev/null
+++ b/packages/SettingsLib/SpaPrivileged/OWNERS
@@ -0,0 +1 @@
+include platform/frameworks/base:/packages/SettingsLib/Spa/OWNERS