Update ImageClassifier.java

[GuitarZhang]

When switching from GPU mode to CPU mode, gpuDelegate is not released. If switching to GPU again, gpuDelegate will be regenerated. If you keep switching, the memory will explode.

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[GuitarZhang]

I signed it.

[gshashank84]

I signed it.

There is ! missing in your reply.

[GuitarZhang]

I signed it!

[rthadur]

@GuitarZhang i cannot see the CLA , can you please check again

[GuitarZhang]

@GuitarZhang i cannot see the CLA , can you please check again

The user name I filled in was 258303742@qq.com(my email) or guitarzhang. Now I fill in the correct user name GuitarZhang, can you Please see again.

[googlebot]

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[rthadur]

@GuitarZhang sorry for the delay , can you please resolve conflicts.

[mellanox-github]

Can one of the admins verify this patch?

[rthadur]

changes are pushed by this commit 343ba94 , closing this , thank you