Keeping forensic cops out I was just arrested and bonded out immediately. my phone was confiscated.  It was an Android and is there anything I can do to keep them from accessing the contents of my phone? Would deleting my Google account keep them from changing my password? Google will give them their own personal passcode to get into my locked screen and change pin lock.I'm not sure what question to ask,any help would be highly appreciated by me and my family
Is there anything I can do to keep them from accessing the contents of
  my phone?


If they have physical access over phone, then the answers is no. If the information was encrypted, then you would stand a chance. However, if that is not the case, then in no time they will have access to your phone and the data it keeps within.


  Would deleting my Google account keep them from changing my password?


No. The data is already written on the storage of your phone. One thing you would do would be wiping your phone using Android Device Manager. However, it won't actually wipe the data really. It'll just make it overwritable for other datas to take its place, which will be ineffective anyway. But that for sure will make people realize you got something to hide and might even be considered as tampering the evidence as acejavelin said.


  I'm not sure what question to ask


I think the question you want to ask is Are they going to certainly learn whatever is on the phone and is there a way to stop them at this point?

The answers are yes and no respectively.