ContributesRemoteFeatureCodeGeneratorBucketAssignmentTest can be flakey; add logs for when it next fails (#6085)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/1202552961248957/task/1207989251288356?focus=true

### Description

### Steps to test this PR

_Feature 1_
- [ ]
- [ ]

### UI changes
| Before  | After |
| ------ | ----- |
!(Upload before screenshot)|(Upload after screenshot)|

Co-authored-by: Craig Russell <[email protected]>

Author: CDRussell

feature-toggles/feature-toggles-impl/src/test/java/com/duckduckgo/feature/toggles/codegen/ContributesRemoteFeatureCodeGeneratorBucketAssignmentTest.kt

@@ -35,8 +35,8 @@ import org.mockito.kotlin.mock
 import org.mockito.kotlin.whenever
 import org.robolectric.ParameterizedRobolectricTestRunner
 
-private var enables = 1
-private var disables = 1
+private var enables = 0
+private var disables = 0
 
 @RunWith(ParameterizedRobolectricTestRunner::class)
 class ContributesRemoteFeatureCodeGeneratorBucketAssignmentTest(private val testCase: TestCase) {
@@ -62,12 +62,19 @@ class ContributesRemoteFeatureCodeGeneratorBucketAssignmentTest(private val test
 
     @Test
     fun `test probability`() {
-        fun isWithinRange(): Boolean {
-            if (testCase.run < 9000) return true // small sample sizes will have high variance
+        fun assertWithinRange() {
+            if (testCase.run < 9000) return // small sample sizes will have high variance
             val allowableDeviation = (enables + disables) / 2 * 6.0f / 100 // allowable deviation of 6%
 
             // Check if the absolute difference between the two numbers is within the allowable deviation
-            return abs(enables - disables) <= allowableDeviation
+            val difference = abs(enables - disables)
+            assertTrue(
+                "Given sample size of ${enables + disables}, the allowable deviation (6%) is: $allowableDeviation, " +
+                    "but actual difference was $difference " +
+                    "(enables=$enables" +
+                    ", disables=$disables)",
+                difference <= allowableDeviation,
+            )
         }
 
         val feature = generatedFeatureNewInstance()
@@ -103,7 +110,7 @@ class ContributesRemoteFeatureCodeGeneratorBucketAssignmentTest(private val test
         } else {
             disables++
         }
-        assertTrue(isWithinRange())
+        assertWithinRange()
     }
 
     data class TestCase(val rollout: Int, val run: Int)
@@ -112,7 +119,7 @@ class ContributesRemoteFeatureCodeGeneratorBucketAssignmentTest(private val test
         @ParameterizedRobolectricTestRunner.Parameters()
         fun parameters(): List<TestCase> {
             val l = mutableListOf<TestCase>()
-            repeat(10000) {
+            repeat(10_000) {
                 l.add(TestCase(run = it, rollout = 50))
             }