[BUG] Hardened builds do not work since 1.14.1-beta.1

[iAmMONK]

Describe the bug
Hardened builds do not work since 1.14.1-beta.1. Also tested on 1.15.0-beta.1. The CallAgent seems to fail at creation.

Current proguard rules:

-keep class com.skype.rt.** {*;}
-keep class com.azure.** {*;}
-keep class com.skype.android.** {*;}
-keep class com.microsoft.media.** {*;}
-keep class com.microsoft.dl.** {*;}
-keep class com.microsoft.trouterclient.** {*;}
-keep class com.fasterxml.jackson.databind.deser.** { *; }
-keep class com.ctc.wstx.stax.** { *; }
-keepresourcefiles lib/**/libc++_shared.so
-keepresourcefiles lib/**/libskypert.so

Exception or Stack Trace

[#fdb655b8-S] T#29341 S.18 [ERROR] [skyper.Aria] fdb655b8: 
[#feb26955-S] T#29341 S.18 [ERROR] [skyper.Aria] feb26955: 
[#00000000-S] T#29665 [ERROR] [azure-communication-services.calling] @b4000073386f6690: CreateCallAgentInternal exit

Code Snippet

        val callClient = CallClient()
        val commCredentialToken = CommunicationTokenCredential(sessionToken)

        callAgent = callClient.createCallAgent(context, commCredentialToken)
            .get()

Expected behavior
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Screenshots
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Setup (please complete the following information):

• OS: Android 15
• IDE : [e.g. IntelliJ]
• Version of the Library used 1.15.0-beta.1

Additional context
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[JonathanGiles]

@alexandra142 are you able to review if this is related to ACS?