Define the ActionUi.

Each ActionUi represents either an authentication action or an action-chip
action. It should have been officially defined in jetpack but for now
keep it in the ux before the jetpack is shippable to the framework.

Bug: 255688485
Test: local deployment
Change-Id: I33351d884324efa6157511199d5200669151168d

packages/CredentialManager/src/com/android/credentialmanager/jetpack/ActionUi.kt

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2022 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.credentialmanager.jetpack
+
+import android.app.slice.Slice
+import android.credentials.ui.Entry
+import android.graphics.drawable.Icon
+
+/**
+ * UI representation for a credential entry used during the get credential flow.
+ *
+ * TODO: move to jetpack.
+ */
+class ActionUi(
+  val icon: Icon,
+  val text: CharSequence,
+  val subtext: CharSequence?,
+) {
+  companion object {
+    fun fromSlice(slice: Slice): ActionUi {
+      var icon: Icon? = null
+      var text: CharSequence? = null
+      var subtext: CharSequence? = null
+
+      val items = slice.items
+      items.forEach {
+        if (it.hasHint(Entry.HINT_ACTION_ICON)) {
+          icon = it.icon
+        } else if (it.hasHint(Entry.HINT_ACTION_TITLE)) {
+          text = it.text
+        } else if (it.hasHint(Entry.HINT_ACTION_SUBTEXT)) {
+          subtext = it.text
+        }
+      }
+      // TODO: fail NPE more elegantly.
+      return ActionUi(icon!!, text!!, subtext)
+    }
+  }
+}