Add font type to AAPT2

Test: make libaapt2_tests AaptTestAppOne
Change-Id: I8fbf01675a218cc3c0b59598b6b1ec173851e946
diff --git a/tools/aapt2/Resource_test.cpp b/tools/aapt2/Resource_test.cpp
index 720ab91..6acb4d3 100644
--- a/tools/aapt2/Resource_test.cpp
+++ b/tools/aapt2/Resource_test.cpp
@@ -57,6 +57,10 @@
   ASSERT_NE(type, nullptr);
   EXPECT_EQ(*type, ResourceType::kDrawable);
 
+  type = ParseResourceType("font");
+  ASSERT_NE(type, nullptr);
+  EXPECT_EQ(*type, ResourceType::kFont);
+
   type = ParseResourceType("fraction");
   ASSERT_NE(type, nullptr);
   EXPECT_EQ(*type, ResourceType::kFraction);