Fix a few small switch browser bugs

[shahzaibj]

• URL was being loweredcased which caused the purpose token to get lowercased and become invalid
• At resume the authorization header value needs to have Bearer prefix
• The Switch Browser URL were having double scheme (https) in them due to how they were being formed. Example https/https://www.myurl.com

This PR fixes the above mentioned issues.

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[Copilot]

Pull Request Overview

This PR addresses several small bugs in the switch browser flow by updating URI construction, ensuring the Authorization header includes the Bearer prefix, and correcting URL handling in the web view client.

• Use Uri.parse and buildUpon instead of manual string splitting to construct switch browser URIs.
• Prepend "Bearer " to the authorization code when building resume headers.
• Fix inconsistent URL variable usage in processSwitchBrowserRequest.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
common/src/main/java/com/microsoft/identity/common/internal/ui/webview/switchbrowser/SwitchBrowserUriHelper.kt	Replace manual URI building with Uri.parse(actionUri).buildUpon().
common/src/main/java/com/microsoft/identity/common/internal/ui/webview/switchbrowser/SwitchBrowserProtocolCoordinator.kt	Add "Bearer " prefix to authorization header value.
common/src/main/java/com/microsoft/identity/common/internal/ui/webview/AzureActiveDirectoryWebViewClient.java	Use url instead of formattedURL in processSwitchBrowserRequest.
changelog.txt	Add patch entry for switch browser bug fixes.

Comments suppressed due to low confidence (1)

common/src/main/java/com/microsoft/identity/common/internal/ui/webview/switchbrowser/SwitchBrowserProtocolCoordinator.kt:137

• Add or update a unit test to verify that the Authorization header value correctly includes the Bearer prefix when building the resume URI headers.

            val authorizationHeaderValue = "Bearer $code"

[p3dr0rv]

seems we need to update the unit test

[shahzaibj]

seems we need to update the unit test

Updated the UTs!