Add default option for android debugger

#682

Author: Fatme Havaluova

lib/services/android-debug-service.ts

@@ -54,10 +54,13 @@ class AndroidDebugService implements IDebugService {
 	public debugOnDevice(): IFuture<void> {
 		return (() => {
 			let packageFile = "";
+            
+            if(!this.$options.debugBrk && !this.$options.start) {
+                this.$logger.warn("Neither --debug-brk nor --start option was specified. Defaulting to --debug-brk.");                
+                this.$options.debugBrk = true;
+            }
 
 			if (this.$options.debugBrk) {
-				this.$platformService.preparePlatform(this.platform).wait();
-
 				let cachedDeviceOption = this.$options.forDevice;
 				this.$options.forDevice = true;
 				this.$platformService.buildPlatform(this.platform).wait();
@@ -87,8 +90,6 @@ class AndroidDebugService implements IDebugService {
                 this.detachDebugger(packageName).wait();
             } else if (this.$options.debugBrk) {
                 this.startAppWithDebugger(packageFile, packageName).wait();
-            } else {
-                this.$logger.info("Should specify at least one option: debug-brk, start, stop, get-port.");
             }
         }).future<void>()();
     }