Add Angstroms Length-Converter option (#2229)

* Add Length_Angstrom as a new unit constant

Adds Angstrom as a length unit to the list of unit constants in UnitConverterDataConstants.h file.

* Add Angstrom unit to Length units in UnitConverterDataLoader.cpp

Adds the Angstrom unit of length to the list of length units in UnitConverterDataLoader.cpp and its conversion data is added to the GetConversionData() function.

It is assigned the value of 15.

* Add Angstrom as a Unit of Length

Adds new data entries to Resources.resw for unit abbreviation of Angstrom, and the unit name for Angstrom.

* Add conversion data "Meters-Angstroms" in Test.resw

Adds new data entry for "Meters-Angstroms" to Test.resw file

* Changes order of units of Length to add Angstroms

This commit changes the order of the units of length so that Angstrom is before Nanometers.
Increments orders of all other units by 1 and sets order of Angstroms to 1.

* Fixes 'TestStandardUnitConverterAndDateViewModels' test case failing

This commit fixes the "TestStandardUnitConverterAndDateViewModels" failing by introducing a new resource entry to the Test.resw file.

These changes needed to be made because adding the new unit changed the order of units, hence the test case expected a different value, since it was converting other units.