PLAT-10762 fix android breadcrumb memory leak

[richardelms]

Goal

Some AndroidJavaObject instances were not properly Disposed when passing breadcrumbs through to the native android layer.

Changeset

• Added a disposable container class that tracks all created objects and disposes of them after use.

Testing

Created an example app that, when using the latest release, always crashed within 2 seconds of launching due to the leak. Then rebuilt the app with a new build containing the fix and left it running with a profiler attached for 30 mins. It did not crash and memory usage remaind constant.

[jchowdown]

out of curiosity, do we know when this bug was introduced?