[bundletool] Remove com/sun/jna content

[pjcollins]

Context: c89de29

Various symbol and signing checks have been failing after bumping
bundletool.jar to version 1.17.0. We can fix these by stripping out the
offending content from bundletool.jar.

[pjcollins]

it looks like this is still working, seems best to continue to modify this jar before tests run against it rather than trying to change it in post build-signing stage

[jonathanpeppers]

If bundletool.jar appears to still work, let's try this for now.

[jonathanpeppers]

Posting what I found, regarding usage of com.sun.jna:

.\gradlew dependencies
...
+--- com.android.tools:common:31.3.0-alpha14
...
|    +--- net.java.dev.jna:jna-platform:5.6.0
|    |    \--- net.java.dev.jna:jna:5.6.0

If I remove com.android.tools:common:31.3.0-alpha14, I get a few compile errors:

> .\gradlew build

> Task :compileJava
D:\src\bundletool\src\main\java\com\android\tools\build\bundletool\device\Device.java:25: error: package com.android.sdklib does not exist
import com.android.sdklib.AndroidVersion;
                         ^
D:\src\bundletool\src\main\java\com\android\tools\build\bundletool\device\Device.java:42: error: cannot find symbol
  public abstract AndroidVersion getVersion();
                  ^
  symbol:   class AndroidVersion
  location: class Device
D:\src\bundletool\src\main\java\com\android\tools\build\bundletool\device\DdmlibDevice.java:81: error: cannot find symbol
  public AndroidVersion getVersion() {
         ^
  symbol:   class AndroidVersion
  location: class DdmlibDevice
3 errors

> Task :compileJava FAILED

FAILURE: Build failed with an exception.

So, perhaps com.android.tools:common is only used for looking up an attached device's version. But generally deploying aab's seems to be working on CI.

I don't offhand see what would use com.sun.jna, so let's merge and try it out.