core+tools: support specifying F2FS as the fstype for userdata

- Support TARGET_USERIMAGES_USE_F2FS.
- Support BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE.
- Support "userdata_fs_type" in the prop dict.
- Update build_image to recognize f2fs and call the correct command.

Change-Id: If31cc8bd235f93a4c7814fab36e6e2d13d3037ad
Signed-off-by: JP Abgrall <jpa@google.com>

tools/releasetools/build_image.py

@@ -256,6 +256,9 @@ def BuildImage(in_dir, prop_dict, out_file,
       build_command.append(fc_config)
     elif "selinux_fc" in prop_dict:
       build_command.append(prop_dict["selinux_fc"])
+  elif fs_type.startswith("f2fs"):
+    build_command = ["mkf2fsuserimg.sh"]
+    build_command.extend([out_file, prop_dict["partition_size"]])
   else:
     build_command = ["mkyaffs2image", "-f"]
     if prop_dict.get("mkyaffs2_extra_flags", None):
@@ -325,7 +328,9 @@ def ImagePropFromGlobalDict(glob_dict, mount_point):
     copy_prop("fs_type", "fs_type")
     copy_prop("system_size", "partition_size")
   elif mount_point == "data":
+    # Copy the generic fs type first, override with specific one if available.
     copy_prop("fs_type", "fs_type")
+    copy_prop("userdata_fs_type", "fs_type")
     copy_prop("userdata_size", "partition_size")
   elif mount_point == "cache":
     copy_prop("cache_fs_type", "fs_type")