[6_0_X][TIMOB-24308] Android: Use Math.floor() when converting percentage values

[garymathews]

• Cherry-pick of [TIMOB-24308] Android: Use Math.floor() when converting percentage values #8835

JIRA Ticket

[antw12]

Looks fine to me after taking a look and doing a CR on it, its ready for an FR

[mukherjee2]

NPM Version: 2.15.9
Node Version: 4.5.0
Mac OS: 10.12.1
Appc CLI: 6.1.0
Appc CLI NPM: 4.2.8
Passed FR with this environment:
NPM Version: 2.15.9
Node Version: 4.5.0
Mac OS: 10.12.1
Appc CLI: 6.1.0
Appc CLI NPM: 4.2.8
Appcelerator Studio, build: 4.8.1.201612050850
Android Device: 7.1, 7.1.1, 6.0.1

Tested with Google Pixel, and Pixel XL. Four color bars were seen in either Portrait or Landscape mode, as expected. Gray bar was not seen, as expected. For future regression testing, this needs to the tested with Pixel at the minimum.