Solving Android App Crashing & screen flickering

We are looking to fix small bugs in our existing Android App. We have script in place that generates crash reports. Attached txt file has details on it. Also on google map activity, screen flickers in some of the handsets The freelancer whom we award this task has to agree on the following: 1. Client details will not be disclosed with anyone in person or company, either directly or indirectly. 2. Change log will be properly maintained. 3. Source code belongs to us. So, once task completed entire source code in zip file will be transferred to us. On verifying the received version of app source code along with change log documentation, payment in full will be released. 4. After completion of the task successfully, freelancer will delete entire source code from his/her computer / laptop also should not be preserved in any form electronically or otherwise.