Revert "gralloc: disable gralloc1 API"

This reverts commit 90ebb77b04de47f3b0f8944dfe2d05f4c8fadb6a.

Reason for revert: VLC works well with gralloc1 enabled. the ycbcr error was caused by gralloc1HAL.

Change-Id: Iaea3f5fe25515d2245ce8be3328216bccbffbdd0
diff --git a/gralloc/Android.yukawa.mk b/gralloc/Android.yukawa.mk
index 7fdc608..7f40502 100644
--- a/gralloc/Android.yukawa.mk
+++ b/gralloc/Android.yukawa.mk
@@ -31,7 +31,7 @@
 #
 
 # Gralloc1 support
-GRALLOC_USE_GRALLOC1_API=0
+GRALLOC_USE_GRALLOC1_API=1
 # Use ION DMA heap for all allocations. Default is system heap.
 GRALLOC_USE_ION_DMA_HEAP=1
 # Use ION Compound heap for all allocations. Default is system heap.