Use the special CONSTRAINED font bucket for flo.

This is a temporary font profile to get razor and razorg (Nexus 7,
2013 version). It's not tested thoroughly, and should not be used for
any other devices.

The CONSTRAINED profile removes Bamum, Lisu, Mandaic, Mongolian, New
Tai Lue, Syriac, Tibetan, and Vai fonts from razor[g] devices, and
switches the CJK fonts to the limited pre-Lollipop fonts.

Bug: 22929087
Change-Id: I7edd001adf950fcf787a28c416aada9b449f2197
diff --git a/BoardConfigCommon.mk b/BoardConfigCommon.mk
index bfd9de3..da7768e 100755
--- a/BoardConfigCommon.mk
+++ b/BoardConfigCommon.mk
@@ -119,5 +119,7 @@
 # Enable Minikin text layout engine (will be the default soon)
 USE_MINIKIN := true
 
-# Include an expanded selection of fonts
-EXTENDED_FONT_FOOTPRINT := true
+# Only include a limited subset of the fonts.
+# Note: this footprint is not thorougly tested and should not be used on any
+# device other than flo.
+CONSTRAINED_FONT_FOOTPRINT := true