fix(iOS): Ti.UI.convertUnits does not consult ti.ui.defaultunit property

[sgtcoolguy]

JIRA: https://jira.appcelerator.org/browse/TIMOB-26113

Description:
When attempting to convert units, the Ti.UI.convertUnits method should assume the units specified in the ti.ui.defaultunit Ti.App.Property value when the first value passed in does not explicitly state the input units.

This PR fixes this on iOS. Under the hood is didn't consult it at all and instead assumed 'dpi'. I also made that method allow for number values to be passed in for the first argument (and not just strings).

Note that the first commit is simply to fix the formatting on the files to match our standards, you should look at the second commit for review purposes.

Test case:
In your tiapp.xml file, change the ti.ui.defaultunit value to 'px' or 'in' for the tests below. Our automated suite uses whatever unit is filled into the trap.xml by default, which is 'dp' - so I can't easily write an automated test for this fix (as 'dp' and 'dpi' are just alternate ways of specifying the same unit type, and so our default apps fill in the same unit type for default as the iOS was hard-coded to assume).

const logicalDensityFactor = Ti.Platform.displayCaps.logicalDensityFactor;
const dpi = Ti.Platform.displayCaps.dpi;
// When ti.ui.defaultunit is px, test value as Number and String
Ti.API.info('should be roughly 2.54: ' + Ti.UI.convertUnits(dpi + '', Ti.UI.UNIT_CM));
Ti.API.info('should be roughly 2.54: ' + Ti.UI.convertUnits(dpi, Ti.UI.UNIT_CM));
Ti.API.info('should be roughly 1: ' + Ti.UI.convertUnits(logicalDensityFactor + '', Ti.UI.UNIT_DIP));
Ti.API.info('should be roughly 1: ' + Ti.UI.convertUnits(logicalDensityFactor, Ti.UI.UNIT_DIP));
Ti.API.info('should be exactly 1: ' + Ti.UI.convertUnits(dpi + '', Ti.UI.UNIT_IN));
Ti.API.info('should be exactly 1: ' + Ti.UI.convertUnits(dpi, Ti.UI.UNIT_IN));
Ti.API.info('should be roughly 25.4: ' + Ti.UI.convertUnits(dpi + '', Ti.UI.UNIT_MM));
Ti.API.info('should be roughly 25.4: ' + Ti.UI.convertUnits(dpi, Ti.UI.UNIT_MM));

// When ti.ui.defaultunit is in, test value as Number and String
Ti.API.info('should be roughly 2.54: ' + Ti.UI.convertUnits('1', Ti.UI.UNIT_CM));
Ti.API.info('should be roughly 2.54: ' + Ti.UI.convertUnits(1, Ti.UI.UNIT_CM));
Ti.API.info('should be roughly ' + (dpi / logicalDensityFactor) + ': ' + Ti.UI.convertUnits('1', Ti.UI.UNIT_DIP));
Ti.API.info('should be roughly ' + (dpi / logicalDensityFactor) + ': ' + Ti.UI.convertUnits(1, Ti.UI.UNIT_DIP));
Ti.API.info('should be roughly ' + dpi + ': ' + Ti.UI.convertUnits('1', Ti.UI.UNIT_PX));
Ti.API.info('should be roughly ' + dpi + ': ' + Ti.UI.convertUnits(1, Ti.UI.UNIT_PX));

[build]

	Fails
🚫	Tests have failed, see below for more information.

	Messages
📖	👍 Hey!, You deleted more code than you added. That's awesome!
📖	💾 Here's the generated SDK zipfile.

Tests:

Classname	Name	Time	Error
android.Titanium.UI.TextField	focus-blur-bubbles	5.873	timeout of 5000ms exceeded

Generated by 🚫 dangerJS

[vijaysingh-axway]

CR passed.

[sgtcoolguy]

Merged manually