android: avoid cloning previous global fields on each log

[snowp]

In order to support global fields being persisted on the AppExit log emitted by Android on next app start we were overriding the logs for each log with the global state fields from the previous app run. This instead relies on new behavior in shared core to apply the old values to the logs that specify the previous process run session ID, which avoids the extra allocations in the common case

Also enhances the integration test to verify that we are correctly using the state fields from the process run that crashed and not the reporting one.

Depends on bitdriftlabs/shared-core#357

---

• CHANGELOG.md's "Unreleased" section has been updated, if applicable.

[github-actions]

Size Comparison Report (x86_64)

Metric	APK (KB)	SO (KB)
Baseline	3370	1248
Current	3374	1252
Difference	4	4

APK size increased by 4 KB. SO size increased by 4 KB.

[github-actions]

Android Benchmark Results

Device: PR: Emulator - Android SDK built for x86_64 (API 31) | main: Emulator - Android SDK built for x86_64 (API 31)

Note: Benchmarks run on emulator. Results may vary between runs and may differ from physical devices.

Allocations

Test	PR	main	Δ
logHttpNetworkLog50FieldsAndHeadersAndFieldProviders	1084	1040	+4.2%
logNotMatched10Fields	18	18	0.0%
logNotMatched5000Fields	160	160	0.0%
logNotMatched500Fields	160	132	+21.2%
logNotMatched5Fields	15	15	0.0%
logNotMatchedNoFields	1	1	0.0%
trackSpansWithFields	361	317	+13.9%
trackSpansWithoutFields	56	55	+1.8%

Timing

Test	PR	main	Δ
logHttpNetworkLog50FieldsAndHeadersAndFieldProviders	232.84 us	242.75 us	-4.1%
logNotMatched10Fields	5.64 us	6.58 us	-14.3%
logNotMatched5000Fields	2.26 ms	2.82 ms	-19.7%
logNotMatched500Fields	231.43 us	280.18 us	-17.4%
logNotMatched5Fields	3.19 us	3.70 us	-13.8%
logNotMatchedNoFields	437 ns	530 ns	-17.6%
trackSpansWithFields	456.06 us	582.27 us	-21.7%
trackSpansWithoutFields	7.59 us	8.31 us	-8.7%

[kattrali]

tidy ✨ 🧹

[FranAguilera]

optional nit: you could remove this to prevent potential infinite loop and use generateSequence instead

    val testLog = generateSequence { CaptureTestJniLibrary.nextUploadedLog() }
        .take(10)
        .first { it.message == "test log" }

    assertThat(testLog.sessionId).isEqualTo("bar")
    assertThat(testLog.fields["app_version"]).isEqualTo(FieldValue.StringField(newAppVersion))
    assertThat(testLog.fields["_app_version_code"]).isEqualTo(FieldValue.StringField(newAppVersionCode.toString()))