[Common] Update proguard rules, Fixes AB#3340920

[mohitc1]

Updated proguard rules

1. Keep annotation at AndroidBase64, since it is used by reflection
2. removed com.microsoft.identity* from keeps but keeping names to help with logging and exception. So, names are not obfuscated.
3. Updated build.gradle for jcipAnnotationVersion dependency as it provides runtime objects, to avoid any issues.
4. Added donotwarn for compile time classes (annotations)
5. Major version bump as it can require consumers to adjust their code to avoid build time/runtime issues.

Fixes AB#3340920

Run: https://identitydivision.visualstudio.com/Engineering/_build/results?buildId=1532428&view=results

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[Copilot]

Pull Request Overview

This PR updates ProGuard obfuscation rules to fix build issues and improve debugging capabilities. The changes ensure that critical classes used by reflection are preserved while allowing better logging and exception handling through name preservation.

• Added @Keep annotation to AndroidBase64 class to prevent obfuscation since it's used via reflection
• Updated ProGuard rules to keep names (but allow obfuscation) for Microsoft Identity classes to improve logging
• Added runtime dependency for JCIP annotations and corresponding ProGuard rules

Reviewed Changes

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

File	Description
AndroidBase64.kt	Added @keep annotation and documentation explaining reflection usage
consumer-rules.pro	Updated ProGuard rules for name preservation and annotation handling
build.gradle	Added JCIP annotations dependency
changelog.txt	Added changelog entry for the ProGuard updates

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