Gradle clean task executes not needed steps

先重現 tns build android --bundle --clean，並比較 clean 階段和 build 階段記錄的步驟。追蹤 clean-task 的進入點，判斷為什麼清理時會執行 build-task 邏輯；完成的標準是 clean 不再執行不必要的 build 步驟，同時正常的 build 輸出維持不變。

Environment

• CLI: 5.3.2
• Cross-platform modules:
• Android Runtime: 5.3.1
• iOS Runtime (if applicable):
• Plugin(s):

Describe the bug

Gradle clean...
         + setting applicationId
         + applying user-defined configuration from /Users/myUser/Work/nativescript-cli/scratch/buildProject/app/App_Resources/Android/app.gradle
         + using support library version 28.0.0
         + adding nativescript runtime package dependency: nativescript-optimized-with-inspector
         + adding aar plugin dependency: /Users/myUser/Work/nativescript-cli/scratch/buildProject/node_modules/tns-core-modules-widgets/platforms/android/widgets-release.aar
Gradle build...
         + setting applicationId
         + applying user-defined configuration from /Users/myUser/Work/nativescript-cli/scratch/buildProject/app/App_Resources/Android/app.gradle
         + using support library version 28.0.0
         + adding nativescript runtime package dependency: nativescript-optimized-with-inspector
         + adding aar plugin dependency: /Users/myUser/Work/nativescript-cli/scratch/buildProject/node_modules/tns-core-modules-widgets/platforms/android/widgets-release.aar

As you can see from the above log, the output from Gradle clean... and Gradle build... is the same. Most probably we don't need to execute build task's logic when cleaning the project.

To Reproduce
tns build android --bundle --clean