Merge "Revert "add dev guide for constraint layout."" into nyc-dev
am: a688419378
Change-Id: I910b8c015c547320dd1c62d60214ee9a85d0eddd
This commit is contained in:
am: a688419378
Change-Id: I910b8c015c547320dd1c62d60214ee9a85d0eddd