Add overlayable.xml file to CarSettings

With car-ui-lib adding an overlayable file, CarSettings also needs one
to specify which resources can be overlaid. Some id's were
removed/changed to prevent conflicts with chassis.

Bug: 183965287
Test: manual (created test RRO and verified that values could be
overlaid)

Change-Id: I9d1f5bb32e76d2bc32a3b60cdf32192631d2f8e0
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..94a3ea0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+# IntelliJ
+.idea/
+*.iml
+
+# Python
+*.pyc
\ No newline at end of file