Update Armenian fonts to a variable format

Bug: 168657713

Test: All tests below are manual.
Test: 0. Open a reference device with an existing set of fonts
Test: 1. Upload new fonts.xml and the new fonts to a test device
Test: 2. Change language to Armenian on both devices (look for Հայերեն
or similar)
Test: 3. Open settings on both devices and visually compare them (they
should be the same)
Test: 4. Open the following pages on the test device (and on a reference
device):
Test:  https://en.wikipedia.org/wiki/Armenian_(Unicode_block)
Test:  https://unicode.org/udhr/d/udhr_hye.html
Test:
https://hy.wikipedia.org/wiki/%D5%80%D5%A1%D5%B5%D5%A5%D6%80%D5%A5%D5%B6
Test:  ... and visually compare them (they should be the same)

Change-Id: If95a0f26fb46c030a7f50bd001474bd9a1a103bc

tools/image_generator/ImageGenerator.java

@@ -120,7 +120,7 @@ public class ImageGenerator {
                     put("fa", "NotoNaskhArabicUI-Regular");
                     put("gu", "NotoSansGujaratiUI-Regular");
                     put("hi", "NotoSansDevanagariUI-Regular");
-                    put("hy", "NotoSansArmenian-Regular");
+                    put("hy", "NotoSansArmenian-VF");
                     put("iw", "NotoSansHebrew-Regular");
                     put("ja", "NotoSansCJK-Regular");
                     put("ka", "NotoSansGeorgian-VF");