Fix NotificationShade toggling FLAG_NOT_FOCUSABLE

This fixes some issues caused by the NotificationShade becoming
focusable momentarily (by temporarily toggling off FLAG_NOT_FOCUSABLE
on their window) when locking the screen and animating in AOD.

This is essentially a revert of [1], which meant to make the window
focusable to block touches on the app under the NotificationShade
window. The problem with this approach is that focusability does not
impact where the touch events are actually dispatched, so it didn't fix
the original issue, but does create issues with the IME.

  [1]: I81843d4901f6f3bb0bb00f3d8eaa713da494b0fe

Test: FlickerTestsIme2:com.android.server.wm.flicker.ime.ShowImeOnUnlockScreenTest
Bug: 300446848
Flag: NONE
Change-Id: Ief3a46664ef87e4c23c732189867eda63e9e5688
diff --git a/tests/FlickerTests/IME/AndroidTestTemplate.xml b/tests/FlickerTests/IME/AndroidTestTemplate.xml
index 988f76f..38442db 100644
--- a/tests/FlickerTests/IME/AndroidTestTemplate.xml
+++ b/tests/FlickerTests/IME/AndroidTestTemplate.xml
@@ -10,6 +10,8 @@
     <target_preparer class="com.android.tradefed.targetprep.DeviceSetup">
         <!-- keeps the screen on during tests -->
         <option name="screen-always-on" value="on"/>
+        <!-- enable AOD -->
+        <option name="set-secure-setting" key="doze_always_on" value="1" />
         <!-- prevents the phone from restarting -->
         <option name="force-skip-system-props" value="true"/>
         <!-- set WM tracing verbose level to all -->
diff --git a/tests/FlickerTests/IME/src/com/android/server/wm/flicker/ime/ShowImeOnUnlockScreenTest.kt b/tests/FlickerTests/IME/src/com/android/server/wm/flicker/ime/ShowImeOnUnlockScreenTest.kt
new file mode 100644
index 0000000..31506b5
--- /dev/null
+++ b/tests/FlickerTests/IME/src/com/android/server/wm/flicker/ime/ShowImeOnUnlockScreenTest.kt
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.wm.flicker.ime
+
+import android.platform.test.annotations.Presubmit
+import android.platform.test.rule.UnlockScreenRule
+import android.tools.Rotation
+import android.tools.flicker.junit.FlickerParametersRunnerFactory
+import android.tools.flicker.legacy.FlickerBuilder
+import android.tools.flicker.legacy.LegacyFlickerTest
+import android.tools.flicker.legacy.LegacyFlickerTestFactory
+import android.tools.traces.component.ComponentNameMatcher
+import com.android.server.wm.flicker.BaseTest
+import com.android.server.wm.flicker.helpers.ImeAppHelper
+import org.junit.FixMethodOrder
+import org.junit.Ignore
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.MethodSorters
+import org.junit.runners.Parameterized
+
+/**
+ * Test IME window closing on lock and opening on screen unlock. To run this test: `atest
+ * FlickerTests:CloseImeWindowToHomeTest`
+ */
+@RunWith(Parameterized::class)
+@Parameterized.UseParametersRunnerFactory(FlickerParametersRunnerFactory::class)
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+class ShowImeOnUnlockScreenTest(flicker: LegacyFlickerTest) : BaseTest(flicker) {
+    private val testApp = ImeAppHelper(instrumentation)
+    private val imeOrSnapshot = ComponentNameMatcher.IME.or(ComponentNameMatcher.IME_SNAPSHOT)
+
+    /** {@inheritDoc} */
+    override val transition: FlickerBuilder.() -> Unit = {
+        setup {
+            tapl.expectedRotationCheckEnabled = false
+            testApp.launchViaIntent(wmHelper)
+            testApp.openIME(wmHelper)
+        }
+        transitions {
+            device.sleep()
+            wmHelper.StateSyncBuilder().withoutTopVisibleAppWindows().waitForAndVerify()
+            UnlockScreenRule.unlockScreen(device)
+            wmHelper.StateSyncBuilder().withImeShown().waitForAndVerify()
+        }
+        teardown { testApp.exit(wmHelper) }
+    }
+
+    @Presubmit
+    @Test
+    fun imeAndAppAnimateTogetherWhenLockingAndUnlocking() {
+        flicker.assertLayers {
+            this.isVisible(testApp)
+                .isVisible(imeOrSnapshot)
+                .then()
+                .isInvisible(testApp)
+                .isInvisible(imeOrSnapshot)
+                .then()
+                .isVisible(testApp)
+                .isVisible(imeOrSnapshot)
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Test
+    @Ignore("Not applicable to this CUJ. Display turns off during transition")
+    override fun navBarWindowIsAlwaysVisible() {}
+
+    /** {@inheritDoc} */
+    @Test
+    @Ignore("Not applicable to this CUJ. Display turns off during transition")
+    override fun statusBarWindowIsAlwaysVisible() {}
+
+    /** {@inheritDoc} */
+    @Test
+    @Ignore("Not applicable to this CUJ. Display turns off during transition")
+    override fun taskBarWindowIsAlwaysVisible() {}
+
+    companion object {
+        @Parameterized.Parameters(name = "{0}")
+        @JvmStatic
+        fun getParams() =
+            LegacyFlickerTestFactory.nonRotationTests(
+                supportedRotations = listOf(Rotation.ROTATION_0)
+            )
+    }
+}