fix: make the android debugging backwards compatible

package.json

@@ -36,6 +36,7 @@
     "@types/lodash": "^4.14.109",
     "@types/mocha": "^5.2.1",
     "@types/node": "6.0.46",
+    "@types/semver": "^5.5.0",
     "@types/universal-analytics": "0.4.1",
     "cpx": "^1.5.0",
     "mocha": "^5.2.0",

src/project/androidProject.ts

@@ -1,14 +1,17 @@
 import { ChildProcess } from 'child_process';
 import { EventEmitter } from 'events';
+import * as semver from 'semver';
 import * as stream from 'stream';
 import { NativeScriptCli } from './nativeScriptCli';
 import { IDebugResult, Project } from './project';
 import * as scanner from './streamScanner';
 
 export class AndroidProject extends Project {
+    private cliVersion: string;
 
     constructor(appRoot: string, cli: NativeScriptCli) {
         super(appRoot, cli);
+        this.cliVersion = cli.executeGetVersion();
     }
 
     public platformName(): string {
@@ -37,24 +40,26 @@ export class AndroidProject extends Project {
 
         const debugProcess: ChildProcess = super.executeDebugCommand(args);
         const tnsOutputEventEmitter: EventEmitter = new EventEmitter();
+        const shouldWaitAfterRestartMessage = semver.lt(semver.coerce(this.cliVersion), '5.1.0');
+        const waitForRestartMessage = shouldWaitAfterRestartMessage || args.indexOf('--debug-brk') > -1;
 
-        this.configureReadyEvent(debugProcess.stdout, tnsOutputEventEmitter, args.indexOf('--debug-brk') > -1);
+        this.configureReadyEvent(debugProcess.stdout, tnsOutputEventEmitter, waitForRestartMessage);
 
         return { tnsProcess: debugProcess, tnsOutputEventEmitter };
     }
 
-    protected configureReadyEvent(readableStream: stream.Readable, eventEmitter: EventEmitter, debugBrk?: boolean): void {
+    protected configureReadyEvent(readableStream: stream.Readable, eventEmitter: EventEmitter, waitForRestartMessage?: boolean): void {
         super.configureReadyEvent(readableStream, eventEmitter);
         let debugPort = null;
 
         new scanner.StringMatchingScanner(readableStream).onEveryMatch(new RegExp('device: .* debug port: [0-9]+'), (match: scanner.IMatchFound) => {
             // device: {device-name} debug port: {debug-port}
             debugPort = parseInt((match.matches[0] as string).match('(?:debug port: )([\\d]{5})')[1], 10);
-            if (!debugBrk) {
+            if (!waitForRestartMessage) {
                 setTimeout(() => { eventEmitter.emit('readyForConnection', debugPort); }, 1000);
             }
         });
-        if (debugBrk) {
+        if (waitForRestartMessage) {
             new scanner.StringMatchingScanner(readableStream).onEveryMatch('# NativeScript Debugger started #', (match: scanner.IMatchFound) => {
                 // wait a little before trying to connect, this gives a chance for adb to be able to connect to the debug socket
                 setTimeout(() => { eventEmitter.emit('readyForConnection', debugPort); }, 1000);