TrustAllX509TrustManager android lint warning SSLBlindTrustManager

Environment
- Android Studio Chipmunk | 2021.2.1 Patch 2
- openkit-java v2.2.0

Problem
`warning [TrustAllX509TrustManager](https://github.com/Dynatrace/openkit-java/issues/new#TrustAllX509TrustManager): Insecure TLS/SSL trust manager`

`Insecure TLS/SSL trust manager
[../../com/dynatrace/openkit/protocol/ssl/SSLBlindTrustManager%24BlindX509TrustManager.class](https://github.com/Dynatrace/com/dynatrace/openkit/protocol/ssl/SSLBlindTrustManager%24BlindX509TrustManager.class): checkClientTrusted is empty, which could cause insecure network traffic due to trusting arbitrary TLS/SSL certificates presented by peers
[../../com/dynatrace/openkit/protocol/ssl/SSLBlindTrustManager%24BlindX509TrustManager.class](https://github.com/Dynatrace/com/dynatrace/openkit/protocol/ssl/SSLBlindTrustManager%24BlindX509TrustManager.class): checkServerTrusted is empty, which could cause insecure network traffic due to trusting arbitrary TLS/SSL certificates presented by peers`

Steps to reproduce
- Run lintDebug Gradle task
`./gradlew lintDebug`

Inizia esaminando SSLBlindTrustManager e la relativa classe BlindX509TrustManager, quindi esegui ./gradlew lintDebug per riprodurre l'avviso relativo a TrustAllX509TrustManager. Determina il comportamento previsto per la convalida dei certificati e individua i test esistenti pertinenti prima di modificare qualsiasi cosa. Il lavoro è completato quando l'avviso è stato risolto senza indebolire la convalida TLS.

Scritto dal modello di indicizzazione a partire dal testo della issue.