ui: add "clear results" action to Benchmark screen

examples/llama.android/app/src/main/java/com/example/llama/revamp/MainActivity.kt

@@ -271,6 +271,11 @@ fun AppContent(
                 ),
                 bottomBarConfig = BottomBarConfig.Benchmark(
                     engineIdle = !engineState.isUninterruptible,
+                    onShare = {
+                        benchmarkResults.lastOrNull()?.let {
+                            handleScaffoldEvent(ScaffoldEvent.ShareText(it.text))
+                        }
+                    },
                     onRerun = {
                         if (engineState.isUninterruptible) {
                             handleScaffoldEvent(ScaffoldEvent.ShowSnackbar(
@@ -281,11 +286,7 @@ fun AppContent(
                             benchmarkViewModel.runBenchmark()
                         }
                     },
-                    onShare = {
+                    onClear = benchmarkViewModel::clearResults,
-                        benchmarkResults.lastOrNull()?.let {
-                            handleScaffoldEvent(ScaffoldEvent.ShareText(it.text))
-                        }
-                    },
                     showModelCard = showModelCard,
                     onToggleModelCard = benchmarkViewModel::toggleModelCard,
                 )

examples/llama.android/app/src/main/java/com/example/llama/revamp/ui/scaffold/AppScaffold.kt

@@ -105,8 +105,9 @@ fun AppScaffold(
             is BottomBarConfig.Benchmark -> {
                 BenchmarkBottomBar(
                     engineIdle = config.engineIdle,
-                    onRerun = config.onRerun,
                     onShare = config.onShare,
+                    onRerun = config.onRerun,
+                    onClear = config.onClear,
                     showModelCard = config.showModelCard,
                     onToggleModelCard = config.onToggleModelCard,
                 )

examples/llama.android/app/src/main/java/com/example/llama/revamp/ui/scaffold/bottombar/BenchmarkBottomBar.kt

@@ -7,6 +7,7 @@ import androidx.compose.animation.scaleIn
 import androidx.compose.animation.scaleOut
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Badge
+import androidx.compose.material.icons.filled.ClearAll
 import androidx.compose.material.icons.filled.Replay
 import androidx.compose.material.icons.filled.Share
 import androidx.compose.material.icons.outlined.Badge
@@ -20,8 +21,9 @@ import androidx.compose.runtime.Composable
 @Composable
 fun BenchmarkBottomBar(
     engineIdle: Boolean,
-    onRerun: () -> Unit,
     onShare: () -> Unit,
+    onRerun: () -> Unit,
+    onClear: () -> Unit,
     showModelCard: Boolean,
     onToggleModelCard: (Boolean) -> Unit,
 ) {
@@ -37,6 +39,13 @@ fun BenchmarkBottomBar(
                 )
             }
 
+            IconButton(onClick = onClear) {
+                Icon(
+                    imageVector = Icons.Default.ClearAll,
+                    contentDescription = "Clear benchmark results"
+                )
+            }
+
             IconButton(onClick = { onToggleModelCard(!showModelCard) } ) {
                 Icon(
                     imageVector = if (showModelCard) Icons.Default.Badge else Icons.Outlined.Badge,

examples/llama.android/app/src/main/java/com/example/llama/revamp/ui/scaffold/bottombar/BottomBarConfig.kt

@@ -87,8 +87,9 @@ sealed class BottomBarConfig {
 
     data class Benchmark(
         val engineIdle: Boolean,
-        val onRerun: () -> Unit,
         val onShare: () -> Unit,
+        val onRerun: () -> Unit,
+        val onClear: () -> Unit,
         val showModelCard: Boolean,
         val onToggleModelCard: (Boolean) -> Unit,
     ) : BottomBarConfig()

examples/llama.android/app/src/main/java/com/example/llama/revamp/viewmodel/BenchmarkViewModel.kt

@@ -67,6 +67,12 @@ class BenchmarkViewModel @Inject constructor(
         }
         return true
     }
+
+    override suspend fun performCleanup() = clearResults()
+
+    fun clearResults() {
+        _benchmarkResults.value = emptyList()
+    }
 }
 
 data class BenchmarkResult(