Add Japanese to fallback fonts

On devices with adequate space, add MTLmr3m.ttf (Japanese) to the set
of fallback fonts. By default, DroidSansFallback (Chinese) is given
priority over MTLmr3m. If the locale is changed to Japanese, the
priority is reversed.

Bug: 6272763
Change-Id: I785a927d6dff0206aa9a670c51fdad76e219fc97
diff --git a/data/fonts/fonts.mk b/data/fonts/fonts.mk
index 458f85b..db26765 100644
--- a/data/fonts/fonts.mk
+++ b/data/fonts/fonts.mk
@@ -15,8 +15,8 @@
 # Warning: this is actually a product definition, to be inherited from
 
 PRODUCT_COPY_FILES := \
-    frameworks/base/data/fonts/system_fonts.xml:system/etc/system_fonts.xml \
-    frameworks/base/data/fonts/fallback_fonts.xml:system/etc/fallback_fonts.xml
+    frameworks/base/data/fonts/system_fonts.xml:$(TARGET_COPY_OUT_SYSTEM)/etc/system_fonts.xml \
+    frameworks/base/data/fonts/fallback_fonts.xml:$(TARGET_COPY_OUT_SYSTEM)/etc/fallback_fonts.xml
 
 PRODUCT_PACKAGES := \
     DroidSansFallback.ttf \