Don't use buffer age in HWUI on fugu

Bug: 28519669

Temporarily disable the use of this extension
in HWUI due to an unexpected edge case

Change-Id: I0a7a219fcaf45cbc69ace707daba7d2b104b739a
diff --git a/BoardConfig.mk b/BoardConfig.mk
index d87f205..926d151 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -106,6 +106,10 @@
     ro.hwui.texture_cache_flushrate = 0.4 \
     ro.hwui.texture_cache_size = 48.0 \
 
+# Temporary to workaround b/28521732 & b/27903668
+ADDITIONAL_DEFAULT_PROPERTIES += \
+    debug.hwui.use_buffer_age = 0
+
 MAX_EGL_CACHE_ENTRY_SIZE := 65536
 MAX_EGL_CACHE_SIZE := 1048576