Introduce REMOVE_FRONT_INSET, REMOVE_BACK_INSET Property

Introduce REMOVE_FRONT_INSET, REMOVE_BACK_INSET Property

Added new property to TextLabel

Example:
textLabel.SetProperty(DevelTextLabel::Property::REMOVE_FRONT_INSET, false);
textLabel.SetProperty(DevelTextLabel::Property::REMOVE_BACK_INSET, false);

When REMOVE_FRONT_INSET is set to false, the xBearing of first glyph won't be trimmed.
When REMOVE_BACK_INSET is set to false, the advance of last glyph won't be trimmed.

Change-Id: I169d87b9f83d3b204ea51601188982cda54cb9d0