OIDURLQueryComponent does not support fragment

Describe the bug
OIDURLQueryComponent does not support parsing fragment in redirect URL. Not all OIDC server by default use query parameters or may not allow query parameters or may not allow request_mode=query. The API presume we always get token as URL query params by default which is incorrect. I am working with OIDC server that does not allow changing request_mode=query and by default use URL fragment instead.

To Reproduce
OIDC server use fragment/hash to return token/code in redirecturl
Example:
org.test://app#code=xxx&nonce=akdfjasd

Expected behavior
response_mode=fragment is not supported and no useful error returned.

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

Desktop (please complete the following information):

• OS: iOS
• Safari
• master

Smartphone (please complete the following information):

• Device: iPad Pro
• OS: iOS12
• Safari
• master

Start with OIDURLQueryComponent and trace how redirect URLs are parsed for query parameters. Reproduce the fragment-form redirect shown in the issue, then verify that fragment responses are handled and that unsupported response modes produce a useful error.