Improve icon assets naming and access for Android (#72)

* Export Android icons with the `ic_compound_` prefix

* Improve `icons.kt.template`:

- Add updated icon token references to `CompoundIcons.kt`.
- Make the code easier to measure by code coverage tools.

src/formats/templates/compose/icons.kt.template

@@ -15,12 +15,14 @@ object <%= file.className %> {
       if (prop.comment) {
         comment = `/** ${prop.comment} */\n  `
       }
-      return comment + 'val ' + options.getIconName(prop.name) + ' @Composable get() = ImageVector.vectorResource(' + formatProperty(prop).split(' = ')[1] + ')'
+      return comment + '@Composable fun ' + options.getIconName(prop.name) + '(): ImageVector {\n' + options.indentLevel + options.indentLevel +
+        'return ImageVector.vectorResource(' + formatProperty(prop).split(' = ')[1] + ')\n' + options.indentLevel +
+        '}'
     }).join('\n' + options.indentLevel ) %>
 
-    val all @Composable get() = persistentListOf(
+    val all @Composable get() = persistentListOf<ImageVector>(
         <%= allProperties.map(function(prop) {
-          return options.getIconName(prop.name) + ','
+          return options.getIconName(prop.name) + '(),'
         }).join('\n' + options.indentLevel + options.indentLevel ) %>
     )
 

src/transforms/kotlin/svgToDrawable.ts

@@ -35,7 +35,7 @@ export default {
 
     // Snake case and replace `icon` with `ic` as this is the convention on Android
     // and on Material
-    const imageId = _.snakeCase(token.name.replace("icon", "ic"));
+    const imageId = _.snakeCase(token.name.replace("icon", "ic_compound_"));
 
     let options = {
       fillBlack: true, // Add black color to path element, defaults to false