Add FontManager#updateFontFamily() API.

Bug: 179103383
Test: atest CtsGraphicsTestCases:FontFamilyUpdateRequestTest
Test: atest CtsGraphicsTestCases:FontFileUpdateRequestTest
Test: atest CtsGraphicsTestCases:FontManagerTest
Test: atest FrameworksServicesTests:UpdatableFontDirTest
Test: atest UpdatableSystemFontTest
Change-Id: I0103784c72d60567675daf73e95e4d716f091e4a

1 files changed, 12 insertions, 0 deletions

diff --git a/graphics/java/android/graphics/fonts/FontVariationAxis.java b/graphics/java/android/graphics/fonts/FontVariationAxis.java
index 7bd581723d18..d1fe2cdbcd77 100644
--- a/graphics/java/android/graphics/fonts/FontVariationAxis.java
+++ b/graphics/java/android/graphics/fonts/FontVariationAxis.java
@@ -23,6 +23,7 @@ import android.os.Build;
 import android.text.TextUtils;
 
 import java.util.ArrayList;
+import java.util.List;
 import java.util.Objects;
 import java.util.regex.Pattern;
 
@@ -189,6 +190,17 @@ public final class FontVariationAxis {
         return TextUtils.join(",", axes);
     }
 
+    /**
+     * Stringify the array of FontVariationAxis.
+     * @hide
+     */
+    public static @NonNull String toFontVariationSettings(@Nullable List<FontVariationAxis> axes) {
+        if (axes == null) {
+            return "";
+        }
+        return TextUtils.join(",", axes);
+    }
+
     @Override
     public boolean equals(@Nullable Object o) {
         if (o == this) {