Is there any ARM powered development platform for wearables development and integration ?
I haven't see anything specifically on Android wear. Access to it has been limited. It's not to say nothing existis.
There are standard Android alternatives out there from a few suppliers that optimized HW & SW design for the small, low power form factor with standard Android. The WaRP Board is one example. We worked with partners who developed it. Runs Android and features WLAN, BT & BLE, but there is no integrated LTE Modem. Check out www.WaRPboard.org. I believe the board is available to buy for a few sources.
Good luck in finding something suitable.