Remove unused return type in test method

This shaves off a couple of lines of code

Test: atest CtsCompanionDeviceManagerCoreTestCases
Change-Id: Ia09232455d1b059b859740723bd418e559f69074
diff --git a/tests/tests/companion/common/src/android/companion/cts/common/InvocationTracker.kt b/tests/tests/companion/common/src/android/companion/cts/common/InvocationTracker.kt
index 2a571ca..25240d7 100644
--- a/tests/tests/companion/common/src/android/companion/cts/common/InvocationTracker.kt
+++ b/tests/tests/companion/common/src/android/companion/cts/common/InvocationTracker.kt
@@ -48,7 +48,7 @@
 
     fun clearRecordedInvocations()
 
-    fun recordInvocation(invocation: T): Boolean
+    fun recordInvocation(invocation: T)
 }
 
 internal class InvocationContainer<T> : InvocationTracker<T> {
@@ -58,5 +58,7 @@
 
     override fun clearRecordedInvocations() = _invocations.clear()
 
-    override fun recordInvocation(invocation: T) = _invocations.add(invocation)
+    override fun recordInvocation(invocation: T) {
+        _invocations.add(invocation)
+    }
 }
diff --git a/tests/tests/companion/common/src/android/companion/cts/common/RecordingCallback.kt b/tests/tests/companion/common/src/android/companion/cts/common/RecordingCallback.kt
index c438f4c..52a4610 100644
--- a/tests/tests/companion/common/src/android/companion/cts/common/RecordingCallback.kt
+++ b/tests/tests/companion/common/src/android/companion/cts/common/RecordingCallback.kt
@@ -28,17 +28,14 @@
 
     constructor() : this(InvocationContainer())
 
-    override fun onDeviceFound(intentSender: IntentSender) {
+    override fun onDeviceFound(intentSender: IntentSender) =
         logAndRecordInvocation(OnDeviceFound(intentSender))
-    }
 
-    override fun onAssociationPending(intentSender: IntentSender) {
+    override fun onAssociationPending(intentSender: IntentSender) =
         logAndRecordInvocation(OnAssociationPending(intentSender))
-    }
 
-    override fun onAssociationCreated(associationInfo: AssociationInfo) {
+    override fun onAssociationCreated(associationInfo: AssociationInfo) =
         logAndRecordInvocation(OnAssociationCreated(associationInfo))
-    }
 
     override fun onFailure(error: CharSequence?) = logAndRecordInvocation(OnFailure(error))
 
diff --git a/tests/tests/companion/common/src/android/companion/cts/common/RecordingCdmEventObserver.kt b/tests/tests/companion/common/src/android/companion/cts/common/RecordingCdmEventObserver.kt
index 87677ff..7ba5552 100644
--- a/tests/tests/companion/common/src/android/companion/cts/common/RecordingCdmEventObserver.kt
+++ b/tests/tests/companion/common/src/android/companion/cts/common/RecordingCdmEventObserver.kt
@@ -43,27 +43,22 @@
 
     // association change listener behavior
 
-    override fun onAssociationsChanged(associations: List<AssociationInfo>) {
+    override fun onAssociationsChanged(associations: List<AssociationInfo>) =
         recordInvocation(AssociationChange(associations))
-    }
 
     // CDM callback behavior
 
-    override fun onDeviceFound(intentSender: IntentSender) {
+    override fun onDeviceFound(intentSender: IntentSender) =
         recordInvocation(CdmCallback(OnDeviceFound(intentSender)))
-    }
 
-    override fun onAssociationPending(intentSender: IntentSender) {
+    override fun onAssociationPending(intentSender: IntentSender) =
         recordInvocation(CdmCallback(OnAssociationPending(intentSender)))
-    }
 
-    override fun onAssociationCreated(associationInfo: AssociationInfo) {
+    override fun onAssociationCreated(associationInfo: AssociationInfo) =
         recordInvocation(CdmCallback(OnAssociationCreated(associationInfo)))
-    }
 
-    override fun onFailure(error: CharSequence?) {
+    override fun onFailure(error: CharSequence?) =
         recordInvocation(CdmCallback(OnFailure(error)))
-    }
 
     sealed interface CdmEvent
     data class AssociationChange(val associations: List<AssociationInfo>) : CdmEvent
diff --git a/tests/tests/companion/common/src/android/companion/cts/common/RecordingOnAssociationsChangedListener.kt b/tests/tests/companion/common/src/android/companion/cts/common/RecordingOnAssociationsChangedListener.kt
index 2020f99..c024a79 100644
--- a/tests/tests/companion/common/src/android/companion/cts/common/RecordingOnAssociationsChangedListener.kt
+++ b/tests/tests/companion/common/src/android/companion/cts/common/RecordingOnAssociationsChangedListener.kt
@@ -25,7 +25,6 @@
 
     constructor() : this(InvocationContainer())
 
-    override fun onAssociationsChanged(associations: List<AssociationInfo>) {
+    override fun onAssociationsChanged(associations: List<AssociationInfo>) =
         recordInvocation(associations)
-    }
 }
\ No newline at end of file