Custom Backtrace serializer/deserializer - GSON replacement

[BartoszLitwiniuk]

Important note: First we need to merge PR #144

Summary This PR contains all changes needed to replace GSON library which was used for serialization/deserialization data. These modifications are part of the ongoing efforts to optimize the backtrace-android library by reducing external dependencies and enhancing performance.

Key Changes

• Introduces new manual serialization and deserialization logic tailored for Backtrace data models.
• Eliminates the need for GSON, reducing runtime overhead and potential compatibility issues.
• Add unit tests to check the correctness of serialization and deserialization of the main data models

Performance comparison GSON vs custom solution based on included unit-tests

BacktraceData serialization (SerializerBacktraceDataGsonComparisonTest.java)

[GSON] Average execution time: 2.04 milliseconds
[Org.json] Average execution time: 0.942 milliseconds

Different objects serialization (SerializerGsonComparisonTest.java)

Total serialization time of object type BacktraceApiResult [GSON]: 247 milliseconds, [Org.json]: 57 milliseconds
Total serialization time of object type BacktraceResult [GSON]: 11 milliseconds, [Org.json]: 3 milliseconds
Total serialization time of object type BacktraceReport [GSON]: 5 milliseconds, [Org.json]: 8 milliseconds
Total serialization time of object type BacktraceReport [GSON]: 7 milliseconds, [Org.json]: 11 milliseconds
Total serialization time of object type BacktraceStackFrame [GSON]: 1 milliseconds, [Org.json]: 1 milliseconds
Total serialization time of object type SourceCode [GSON]: 2 milliseconds, [Org.json]: 1 milliseconds
Total serialization time of object type ThreadInformation [GSON]: 2 milliseconds, [Org.json]: 2 milliseconds

Different object deserialization (DeserializerGsonComparisonTest.java)

Total deserialization time [GSON] of object BacktraceApiResult: 120 milliseconds, [Org.json]: 42 milliseconds
Total deserialization time [GSON] of object BacktraceApiResult: 1 milliseconds, [Org.json]: 2 milliseconds
Total deserialization time [GSON] of object BacktraceData: 22 milliseconds, [Org.json]: 22 milliseconds
Total deserialization time [GSON] of object BacktraceReport: 3 milliseconds, [Org.json]: 5 milliseconds
Total deserialization time [GSON] of object BacktraceReport: 6 milliseconds, [Org.json]: 4 milliseconds
Total deserialization time [GSON] of object BacktraceResult: 6 milliseconds, [Org.json]: 6 milliseconds
Total deserialization time [GSON] of object BacktraceStackFrame: 2 milliseconds, [Org.json]: 1 milliseconds
Total deserialization time [GSON] of object SourceCode: 1 milliseconds, [Org.json]: 1 milliseconds
Total deserialization time [GSON] of object ThreadInformation: 2 milliseconds, [Org.json]: 2 milliseconds

Potential breaking changes

• If you are a client of this library and you were using GSON annotation import com.google.gson.annotations.SerializedName; you need to replace it with import backtraceio.library.common.json.serialization.SerializedName; and verify if your objects are serialized/deserialized correctly before going to production.

Architecture of new serialization/deserialization flow