java.util.zip.ZipException: File too short to be a zip file: 0

手机:Nexus5X 7.0
版本:0.3.1
其他:在小米4.4上运行正常
异常:
```
E/PatchManager: addPatch
java.util.zip.ZipException: File too short to be a zip file: 0
at java.util.zip.ZipFile.(ZipFile.java:208)
at java.util.zip.ZipFile.(ZipFile.java:147)
at java.util.jar.JarFile.(JarFile.java:161)
at java.util.jar.JarFile.(JarFile.java:125)
at com.alipay.euler.andfix.patch.Patch.init(Patch.java:75)
at com.alipay.euler.andfix.patch.Patch.(Patch.java:67)
at com.alipay.euler.andfix.patch.PatchManager.addPatch(PatchManager.java:126)
at com.alipay.euler.andfix.patch.PatchManager.initPatchs(PatchManager.java:112)
at com.alipay.euler.andfix.patch.PatchManager.init(PatchManager.java:105)
at g.andfix.com.andfix.MainActivity.onCreate(MainActivity.java:36)
at android.app.Activity.performCreate(Activity.java:6664)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
```

Start at Patch.java:75 and trace the patch path from PatchManager.java:105, 112, and 126, using MainActivity.java:36 as the entry point. Compare patch initialization on Nexus 5X Android 7.0 with the reported working Xiaomi Android 4.4 case, then identify why the file is zero bytes and verify that patch loading no longer raises this exception.

Written by the indexing model from the issue text.