fix: activity reference to use reactApplicationContext + avoid every launcher component disabled

[ViniciusSantosFS]

This PR fix two issues,

• Recent RN versions doesn ot accept the direct usse of currentActivity on kt modules
• When the app schedule an icon to kill classesToKill in the queue it does provide a way to remove this previous icon from the queue anymore so if an user selects icon A -> icon B -> icon A every launcher component will be disabled

Fix:

• This PR contain the fix
• completeIconChange removes newClass from classesToKill after it is enabled, so the enabled launcher component cannot be disabled in the same pass.