Enable ION allocator in defconfig

Change-Id: I87ff86442e5b0e0d186441fa306a60c1df65ccd0
diff --git a/debian/defconfig b/debian/defconfig
index 4ec63dd..6588a7f 100644
--- a/debian/defconfig
+++ b/debian/defconfig
@@ -430,3 +430,6 @@
 CONFIG_VIDEO_ADV_DEBUG=y
 CONFIG_VIDEO_MEDIATEK_MIPICSI=y
 CONFIG_MXC_CAMERA_OV5645_MIPI_V2=y
+CONFIG_ANDROID=y
+CONFIG_ION=y
+CONFIG_ION_CMA_HEAP=y