Enable Bitcode supported Framework

Are you filing an issue about iOS 12?
No

Describe the bug
I am using flutter and google sign in which inherently uses AppAuth pod. I am trying to enable bitcode for my project but during xcode build, my build fails with below error
AppAuth/AppAuth.framework/AppAuth' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target.
Do you support bitcode enabled library? how should i get it?

To Reproduce

Expected behavior
Bitcode enabled library.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

Start by reviewing the AppAuth.framework mentioned in the build error and reproduce the Xcode build through the Flutter and Google Sign-In setup described. Check whether the distributed framework supports ENABLE_BITCODE and identify the supported way to obtain or build a compatible library. Done means the reported project builds successfully with bitcode enabled.