KTIJ-28385 [AA] Support SAM constructors in computeImportableName

This allows to properly report them as used in `KtFirImportOptimizer`

This change will also be important for properly fixing KTIJ-28167,
since `computeImportableName` is also used in reference shortener

^KTIJ-28385 Fixed

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/utils/firUtils.kt

@@ -57,6 +57,9 @@ internal fun KtTypeNullability.toConeNullability() = when (this) {
 internal fun FirCallableSymbol<*>.computeImportableName(useSiteSession: FirSession): FqName? {
     if (callableId.isLocal) return null
 
+    // SAM constructors are synthetic, but can be imported
+    if (origin is FirDeclarationOrigin.SamConstructor) return callableId.asSingleFqName()
+
     // if classId == null, callable is topLevel
     val containingClassId = callableId.classId
         ?: return callableId.asSingleFqName()

analysis/analysis-api-fir/tests-gen/org/jetbrains/kotlin/analysis/api/fir/test/cases/generated/cases/components/importOptimizer/FirIdeNormalAnalysisSourceModuleAnalysisApiImportOptimizerTestGenerated.java

@@ -232,6 +232,18 @@ public class FirIdeNormalAnalysisSourceModuleAnalysisApiImportOptimizerTestGener
         runTest("analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedInvokeOperatorImport.kt");
     }
 
+    @Test
+    @TestMetadata("usedNestedSamInterface_constructorCall.kt")
+    public void testUsedNestedSamInterface_constructorCall() throws Exception {
+        runTest("analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorCall.kt");
+    }
+
+    @Test
+    @TestMetadata("usedNestedSamInterface_constructorReference.kt")
+    public void testUsedNestedSamInterface_constructorReference() throws Exception {
+        runTest("analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorReference.kt");
+    }
+
     @Test
     @TestMetadata("usedObject_invokeOperator.kt")
     public void testUsedObject_invokeOperator() throws Exception {

analysis/analysis-api-standalone/tests-gen/org/jetbrains/kotlin/analysis/api/standalone/fir/test/cases/generated/cases/components/importOptimizer/FirStandaloneNormalAnalysisSourceModuleAnalysisApiImportOptimizerTestGenerated.java

@@ -232,6 +232,18 @@ public class FirStandaloneNormalAnalysisSourceModuleAnalysisApiImportOptimizerTe
         runTest("analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedInvokeOperatorImport.kt");
     }
 
+    @Test
+    @TestMetadata("usedNestedSamInterface_constructorCall.kt")
+    public void testUsedNestedSamInterface_constructorCall() throws Exception {
+        runTest("analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorCall.kt");
+    }
+
+    @Test
+    @TestMetadata("usedNestedSamInterface_constructorReference.kt")
+    public void testUsedNestedSamInterface_constructorReference() throws Exception {
+        runTest("analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorReference.kt");
+    }
+
     @Test
     @TestMetadata("usedObject_invokeOperator.kt")
     public void testUsedObject_invokeOperator() throws Exception {

analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorCall.importsAnalysis

@@ -0,0 +1,6 @@
+USED DECLARATIONS:
+
+Declaration: dependency.Outer.NestedSAM
+By names: [NestedSAM]
+
+UNRESOLVED NAMES:

analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorCall.kt

@@ -0,0 +1,15 @@
+// FILE: main.kt
+package test
+
+import dependency.Outer.NestedSAM
+
+val handler = NestedSAM {}
+
+// FILE: dependency.kt
+package dependency
+
+class Outer {
+    fun interface NestedSAM {
+        fun method()
+    }
+}

analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorReference.importsAnalysis

@@ -0,0 +1,6 @@
+USED DECLARATIONS:
+
+Declaration: dependency.Outer.NestedSAM
+By names: [NestedSAM]
+
+UNRESOLVED NAMES:

analysis/analysis-api/testData/components/importOptimizer/analyseImports/usedNestedSamInterface_constructorReference.kt

@@ -0,0 +1,15 @@
+// FILE: main.kt
+package test
+
+import dependency.Outer.NestedSAM
+
+val handler = ::NestedSAM
+
+// FILE: dependency.kt
+package dependency
+
+class Outer {
+    fun interface NestedSAM {
+        fun method()
+    }
+}