Improvement global status item in VS Code Java to be more user friendly

[nickzhums]

Here to suggest two improvements of global status item for VS Code Java

Item 1 - Currently, the tooltip of global status item in VS Code Java shows "ServiceReady". This is a bit generic to the user and does not indicate it is relevant to the Java language server. Suggest to update the tooltip to "Java Language Server Ready".

Item 2 - We are not recording the telemetry of how many users has clicked this icon, thus unable the analyze the usage and effectiveness. Therefore to suggest record the telemetry

[rgrunber]

vscode-java/src/serverStatusBarProvider.ts

Lines 54 to 58 in bd61dc6

	public setReady(): void {
	this.statusBarItem.text = StatusIcon.ready;
	this.statusBarItem.command = Commands.SHOW_SERVER_TASK_STATUS;
	this.statusBarItem.tooltip = "ServiceReady";
	}

Seems like the tooptip could just use a better value.

Another consideration is whether we can do something about #3416 (comment) . Are there instances where it makes sense to hide (StatusBarItem.hide()) it or are we committed to always showing it if some project has triggered the import.

[nickzhums]

Yes, for item 1 we can just update the tooltip.