Add a feature flag for the Unlimited upsell placement

ET-5952

(cherry picked from commit a3ba615759)

mail-featureflags/dagger/src/main/kotlin/ch/protonmail/android/mailfeatureflags/di/FeatureFlagsModule.kt

@@ -39,6 +39,7 @@ import ch.protonmail.android.mailfeatureflags.domain.annotation.IsRestrictMessag
 import ch.protonmail.android.mailfeatureflags.domain.annotation.IsShowRatingBoosterEnabled
 import ch.protonmail.android.mailfeatureflags.domain.annotation.IsSpringOffer2026Enabled
 import ch.protonmail.android.mailfeatureflags.domain.annotation.IsSpringOffer2026Wave2Enabled
+import ch.protonmail.android.mailfeatureflags.domain.annotation.IsUnlimitedPlanPlacementExperimentEnabled
 import ch.protonmail.android.mailfeatureflags.domain.annotation.IsUpsellEnabled
 import ch.protonmail.android.mailfeatureflags.domain.model.BgProcessingRelaxedBatteryConstraint
 import ch.protonmail.android.mailfeatureflags.domain.model.ComposerAutoCollapseQuotedText
@@ -56,6 +57,7 @@ import ch.protonmail.android.mailfeatureflags.domain.model.RestrictMessageWebVie
 import ch.protonmail.android.mailfeatureflags.domain.model.ShowRatingBoosterEnabled
 import ch.protonmail.android.mailfeatureflags.domain.model.SpringOffer2026Enabled
 import ch.protonmail.android.mailfeatureflags.domain.model.SpringOffer2026Wave2Enabled
+import ch.protonmail.android.mailfeatureflags.domain.model.UnlimitedPlanPlacementExperimentEnabled
 import ch.protonmail.android.mailfeatureflags.domain.model.UpsellingEnabled
 import dagger.Module
 import dagger.Provides
@@ -242,4 +244,15 @@ object FeatureFlagsModule {
     @Singleton
     fun provideBgProcessingNewConstraintDef(): FeatureFlagDefinition = BgProcessingRelaxedBatteryConstraint
 
+
+    @Provides
+    @Singleton
+    @IsUnlimitedPlanPlacementExperimentEnabled
+    fun provideUnlimitedPlanPlacementExperiment(factory: BooleanFeatureFlagFactory) =
+        factory.create(key = UnlimitedPlanPlacementExperimentEnabled.key, false)
+
+    @Provides
+    @IntoSet
+    @Singleton
+    fun provideUnlimitedPlanPlacementEnabledDef(): FeatureFlagDefinition = UnlimitedPlanPlacementExperimentEnabled
 }

mail-featureflags/domain/src/main/kotlin/ch/protonmail/android/mailfeatureflags/domain/annotation/FeatureFlagAnnotations.kt

@@ -83,3 +83,7 @@ annotation class IsPushProcessingWithoutWorkerEnabled
 @Qualifier
 @Retention(AnnotationRetention.BINARY)
 annotation class IsBgProcessingRelaxedBatteryConstraintEnabled
+
+@Qualifier
+@Retention(AnnotationRetention.BINARY)
+annotation class IsUnlimitedPlanPlacementExperimentEnabled

mail-featureflags/domain/src/main/kotlin/ch/protonmail/android/mailfeatureflags/domain/model/FeatureFlagDefinitionItems.kt

@@ -145,3 +145,11 @@ data object BgProcessingRelaxedBatteryConstraint : FeatureFlagDefinition(
     description = "When enabled, the periodic background execution worker does not require the battery to be not low.",
     defaultValue = false
 )
+
+data object UnlimitedPlanPlacementExperimentEnabled : FeatureFlagDefinition(
+    key = "MailAndroidV7UnlimitedPlanPlacementExperiment",
+    name = "Enable Unlimited Plan placement experiment",
+    category = FeatureFlagCategory.Upselling,
+    description = "Enables Unlimited Plan placement experiment.",
+    defaultValue = false
+)