Create a battery icon that loads paths

Create a new battery drawable that will load enough resources from
frameworks/base/core/res/res/ to allow for theming overlays. The current
things are overlayable:

- Perimeter path: the outer shape of the battery (including the
terminal)
- Fill mask: path defining the shape of the fill
- Bolt path: charging bolt path. draws with appropriate protection for
visibilty
- Powersave path: path of the plus sign that draws when in powersave
mode. also draws with protection

Test: visual; sysui demo mode
Bug: 123705805
Change-Id: I2bb15fd10e3fec63cb115a8f216794933b717404
diff --git a/packages/SettingsLib/Android.bp b/packages/SettingsLib/Android.bp
index caa928f..730e9e1 100644
--- a/packages/SettingsLib/Android.bp
+++ b/packages/SettingsLib/Android.bp
@@ -29,7 +29,7 @@
 
     resource_dirs: ["res"],
 
-    srcs: ["src/**/*.java"],
+    srcs: ["src/**/*.java", "src/**/*.kt"],
 
     min_sdk_version: "21",