Create and use CI specific group of GMD devices

This should reduce the total CI time of `AndroidCIWithGmd` workflow.
Using the matrix strategy at the GitHub Actions level forces us to run the tests sequentially and download/rebuild everything from scratch at each iteration.

.github/workflows/AndroidCIWithGmd.yaml

@@ -10,9 +10,6 @@ jobs:
 
   android-ci:
     runs-on: macos-12
-    strategy:
-      matrix:
-        device-config: [ "pixel4api30aospatd", "pixelcapi30aospatd" ]
 
     steps:
       - uses: actions/checkout@v3
@@ -30,7 +27,7 @@ jobs:
 
       - name: Run instrumented tests with GMD
         run: ./gradlew cleanManagedDevices --unused-only &&
-          ./gradlew ${{ matrix.device-config }}DemoDebugAndroidTest -Dorg.gradle.workers.max=1
+          ./gradlew ciDemoDebugAndroidTest -Dorg.gradle.workers.max=1
           -Pandroid.testoptions.manageddevices.emulator.gpu="swiftshader_indirect" -Pandroid.experimental.testOptions.managedDevices.emulator.showKernelLogging=true
 
       - name: Upload test reports

build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/GradleManagedDevices.kt

@@ -18,7 +18,7 @@ package com.google.samples.apps.nowinandroid
 
 import com.android.build.api.dsl.CommonExtension
 import com.android.build.api.dsl.ManagedVirtualDevice
-import org.gradle.api.Project
+import org.gradle.kotlin.dsl.get
 import org.gradle.kotlin.dsl.invoke
 
 /**
@@ -27,16 +27,17 @@ import org.gradle.kotlin.dsl.invoke
 internal fun configureGradleManagedDevices(
     commonExtension: CommonExtension<*, *, *, *>,
 ) {
-    val deviceConfigs = listOf(
-        DeviceConfig("Pixel 4", 30, "aosp-atd"),
-        DeviceConfig("Pixel 6", 31, "aosp"),
-        DeviceConfig("Pixel C", 30, "aosp-atd"),
-    )
+    val pixel4 = DeviceConfig("Pixel 4", 30, "aosp-atd")
+    val pixel6 = DeviceConfig("Pixel 6", 31, "aosp")
+    val pixelC = DeviceConfig("Pixel C", 30, "aosp-atd")
+
+    val allDevices = listOf(pixel4, pixel6, pixelC)
+    val ciDevices = listOf(pixel4, pixelC)
 
     commonExtension.testOptions {
         managedDevices {
             devices {
-                deviceConfigs.forEach { deviceConfig ->
+                allDevices.forEach { deviceConfig ->
                     maybeCreate(deviceConfig.taskName, ManagedVirtualDevice::class.java).apply {
                         device = deviceConfig.device
                         apiLevel = deviceConfig.apiLevel
@@ -44,6 +45,13 @@ internal fun configureGradleManagedDevices(
                     }
                 }
             }
+            groups {
+                maybeCreate("ci").apply {
+                    ciDevices.forEach { deviceConfig ->
+                        targetDevices.add(devices[deviceConfig.taskName])
+                    }
+                }
+            }
         }
     }
 }