Fix IllegalStateException when starting a trace before Firebase init

[mrober]

Fix IllegalStateException when starting a trace before Firebase initializes.

This can happen if you manually initialize Firebase. See #4693

[github-actions]

Release note changes

The following release notes were modified. Please ensure they look correct.

Release Notes

firebase-perf

### {{perfmon}} version 21.0.2 {: #performance_v21-0-2}

* {{fixed}} Fix IllegalStateException when starting a trace before Firebase initializes.

* {{changed}} Updated protobuf dependency to `3.25.5` to fix
  [CVE-2024-7254](https://github.com/advisories/GHSA-735f-pc8j-v9w8).

#### {{perfmon}} Kotlin extensions version 21.0.2 {: #performance-ktx_v21-0-2}

The Kotlin extensions library transitively includes the updated
`firebase-perf` library. The Kotlin extensions library has no additional
updates.

[github-actions]

Test Results

  110 files   -  76    110 suites   - 76   2m 18s ⏱️ - 2m 18s
  968 tests  - 266    968 ✅  - 250  0 💤  - 16  0 ❌ ±0 
1 944 runs   - 548  1 944 ✅  - 516  0 💤  - 32  0 ❌ ±0 

Results for commit 1edae57. ± Comparison against base commit 60a5e4c.

This pull request removes 1234 and adds 968 tests. Note that renamed tests count towards both.

com.google.firebase.firestore.AggregateQuerySnapshotTest ‑ createWithCountShouldReturnInstanceWithTheGivenQueryAndCount
com.google.firebase.firestore.AggregateQueryTest ‑ testSourceMustNotBeNull
com.google.firebase.firestore.BlobTest ‑ testComparison
com.google.firebase.firestore.BlobTest ‑ testEquals
com.google.firebase.firestore.BlobTest ‑ testMutableBytes
com.google.firebase.firestore.CollectionReferenceTest ‑ testEquals
com.google.firebase.firestore.DocumentChangeTest ‑ randomTests
com.google.firebase.firestore.DocumentChangeTest ‑ testAdditions
com.google.firebase.firestore.DocumentChangeTest ‑ testChangesWithSortOrderChange
com.google.firebase.firestore.DocumentChangeTest ‑ testDeletions
…

com.google.firebase.perf.FirebasePerfRegistrarTest ‑ testGetComponents
com.google.firebase.perf.FirebasePerformanceTest ‑ firebasePerformanceInitialization_providesRcProvider_remoteConfigManagerIsSet
com.google.firebase.perf.FirebasePerformanceTest ‑ initFirebasePerformance_injectsMetadataIntoConfigResolver
com.google.firebase.perf.FirebasePerformanceTest ‑ initializeFirebasePerformance_emptyMetadataAndCache_metadataAndContextInjected
com.google.firebase.perf.FirebasePerformanceTest ‑ setDataCollectionDefaultEnabled_whenForceDisabledThenCleared_respectsGlobalFlag
com.google.firebase.perf.FirebasePerformanceTest ‑ setDataCollectionDefaultEnabled_whenForceDisabledThenCleared_respectsManifestTrue
com.google.firebase.perf.FirebasePerformanceTest ‑ setDataCollectionDefaultEnabled_whenForceEnabledThenCleared_respectsGlobalFlag
com.google.firebase.perf.FirebasePerformanceTest ‑ setDataCollectionDefaultEnabled_whenForceEnabledThenCleared_respectsManifestFalse
com.google.firebase.perf.FirebasePerformanceTest ‑ testAddingMoreThanMaxLocalAttributes
com.google.firebase.perf.FirebasePerformanceTest ‑ testBothManifestsAgree
…