fix(sessions): Finalize previous session even when auto session tracking is disabled

[romtsn]

Summary

• Removed isEnableAutoSessionTracking() early-return guards from PreviousSessionFinalizer, MovePreviousSession, and InternalSentrySdk.deleteCurrentSessionFile
• The flag controls automatic session lifecycle, not whether sessions exist — manually started sessions (via Sentry.startSession()) write the same files to disk and need the same finalization
• Updated tests to verify sessions are finalized regardless of the auto-tracking flag

Test plan

• Existing tests pass with updated assertions
• Manual verification: start a session with Sentry.startSession() while enableAutoSessionTracking = false, kill the app, relaunch — previous session should be finalized

Fixes #5108

🤖 Generated with Claude Code

[github-actions]

🚨 Detected changes in high risk code 🚨

High-risk code has higher potential to break the SDK and may be hard to test. To prevent severe bugs, apply the rollout process for releasing such changes and be extra careful when changing and reviewing these files:

• sentry-android-core/src/main/java/io/sentry/android/core/InternalSentrySdk.java

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

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Bug Fixes 🐛

• (sessions) Finalize previous session even when auto session tracking is disabled by romtsn in #5154

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_{🤖 This preview updates automatically when you update the PR.}

[github-actions]

🚨 Detected changes in high risk code 🚨

High-risk code has higher potential to break the SDK and may be hard to test. To prevent severe bugs, apply the rollout process for releasing such changes and be extra careful when changing and reviewing these files:

• sentry-android-core/src/main/java/io/sentry/android/core/InternalSentrySdk.java

[github-actions]

🚨 Detected changes in high risk code 🚨

High-risk code has higher potential to break the SDK and may be hard to test. To prevent severe bugs, apply the rollout process for releasing such changes and be extra careful when changing and reviewing these files:

• sentry-android-core/src/main/java/io/sentry/android/core/InternalSentrySdk.java

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	276.17 ms	334.43 ms	58.26 ms
Size	1.58 MiB	2.29 MiB	723.03 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
91bb874	314.47 ms	440.00 ms	125.53 ms
dba088c	333.98 ms	381.16 ms	47.18 ms
d15471f	310.66 ms	368.19 ms	57.53 ms
bbc35bb	298.53 ms	372.17 ms	73.64 ms
d15471f	307.28 ms	381.85 ms	74.57 ms
ad8da22	362.98 ms	453.94 ms	90.96 ms
cf708bd	408.35 ms	458.98 ms	50.63 ms
96449e8	361.30 ms	423.39 ms	62.09 ms
27d7cf8	309.43 ms	364.27 ms	54.85 ms
91bb874	311.00 ms	363.47 ms	52.47 ms

App size

Revision	Plain	With Sentry	Diff
91bb874	1.58 MiB	2.13 MiB	559.07 KiB
dba088c	1.58 MiB	2.13 MiB	558.99 KiB
d15471f	1.58 MiB	2.13 MiB	559.54 KiB
bbc35bb	1.58 MiB	2.12 MiB	553.01 KiB
d15471f	1.58 MiB	2.13 MiB	559.54 KiB
ad8da22	1.58 MiB	2.29 MiB	719.83 KiB
cf708bd	1.58 MiB	2.11 MiB	539.71 KiB
96449e8	1.58 MiB	2.11 MiB	539.35 KiB
27d7cf8	1.58 MiB	2.12 MiB	549.42 KiB
91bb874	1.58 MiB	2.13 MiB	559.07 KiB