add openApp and closeApp methods to ServersAppiumService; enhance tes…

[Snider]

This pull request includes significant updates to the ServersAppiumService class in src/servers/appium.ts. The changes primarily focus on adding new functionalities for controlling Android apps and improving code readability by removing redundant comments and ensuring consistent formatting.

New functionalities:

• Added openApp method to launch an Android app using the monkey command.
• Added closeApp method to force-stop an Android app using the am force-stop command.
• Introduced openAndCloseApp method, which includes an optional script parameter for custom actions to be performed while the app is open.

Code readability improvements:

• Removed redundant comments throughout the ServersAppiumService class to make the code cleaner and easier to read. [1] [2]
• Ensured consistent formatting by aligning code style, such as spacing and semicolon usage. [1] [2]