Add file group for roboto fonts

Export a list of roboto fonts that are used during the generation of
recovery background text images.

Bug: 74397117
Test: build a bootimage
Change-Id: I633b783413e0df49182048d25643c36a4d17dc0b
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..b56efbb
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,23 @@
+//
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+filegroup {
+    name: "recovery_roboto-fonts_dep",
+    export_to_make_var: "recovery_roboto-fonts_dep",
+    srcs: [
+        "*.otf",
+        "*.ttf",
+    ],
+}