Adds appropriate filtering for instant apps

Adds a new filter that includes downloaded and launcher apps, as well
as instant apps, and ensured that instant apps do not appear where
they previously were not expected (downloaded and launcher apps).

Test: Added testing for the existing filter and the new one.

Bug: 36515324
Change-Id: I7ef94442bae14ee18d4b4d70f04f9bf62af9eff8
(cherry picked from commit a4e0356ed48021c353a6964ec8ea4c6b55006282)
diff --git a/packages/SettingsLib/src/com/android/settingslib/applications/ApplicationsState.java b/packages/SettingsLib/src/com/android/settingslib/applications/ApplicationsState.java
index c2ce7c9..8833fb8c 100644
--- a/packages/SettingsLib/src/com/android/settingslib/applications/ApplicationsState.java
+++ b/packages/SettingsLib/src/com/android/settingslib/applications/ApplicationsState.java
@@ -1394,7 +1394,9 @@
 
         @Override
         public boolean filterApp(AppEntry entry) {
-            if ((entry.info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {
+            if (AppUtils.isInstant(entry.info)) {
+                return false;
+            } else if ((entry.info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {
                 return true;
             } else if ((entry.info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
                 return true;
@@ -1407,6 +1409,23 @@
         }
     };
 
+    /**
+     * Displays a combined list with "downloaded" and "visible in launcher" apps only.
+     */
+    public static final AppFilter FILTER_DOWNLOADED_AND_LAUNCHER_AND_INSTANT = new AppFilter() {
+
+        @Override
+        public void init() {
+        }
+
+        @Override
+        public boolean filterApp(AppEntry entry) {
+            return AppUtils.isInstant(entry.info)
+                    || FILTER_DOWNLOADED_AND_LAUNCHER.filterApp(entry);
+        }
+
+    };
+
     public static final AppFilter FILTER_THIRD_PARTY = new AppFilter() {
         @Override
         public void init() {
diff --git a/packages/SettingsLib/tests/integ/src/com/android/settingslib/applications/ApplicationsStateTest.java b/packages/SettingsLib/tests/integ/src/com/android/settingslib/applications/ApplicationsStateTest.java
index e204a3a..6a029f0 100644
--- a/packages/SettingsLib/tests/integ/src/com/android/settingslib/applications/ApplicationsStateTest.java
+++ b/packages/SettingsLib/tests/integ/src/com/android/settingslib/applications/ApplicationsStateTest.java
@@ -110,6 +110,70 @@
     }
 
     @Test
+    public void testDownloadAndLauncherAndInstantAcceptsCorrectApps() {
+        // should include instant apps
+        mEntry.isHomeApp = false;
+        mEntry.hasLauncherEntry = false;
+        when(mEntry.info.isInstantApp()).thenReturn(true);
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER_AND_INSTANT.filterApp(mEntry))
+                .isTrue();
+
+        // should included updated system apps
+        when(mEntry.info.isInstantApp()).thenReturn(false);
+        mEntry.info.flags = ApplicationInfo.FLAG_UPDATED_SYSTEM_APP;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER_AND_INSTANT.filterApp(mEntry))
+                .isTrue();
+
+        // should not include system apps other than the home app
+        mEntry.info.flags = ApplicationInfo.FLAG_SYSTEM;
+        mEntry.isHomeApp = false;
+        mEntry.hasLauncherEntry = false;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER_AND_INSTANT.filterApp(mEntry))
+                .isFalse();
+
+        // should include the home app
+        mEntry.isHomeApp = true;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER_AND_INSTANT.filterApp(mEntry))
+                .isTrue();
+
+        // should include any System app with a launcher entry
+        mEntry.isHomeApp = false;
+        mEntry.hasLauncherEntry = true;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER_AND_INSTANT.filterApp(mEntry))
+                .isTrue();
+    }
+
+    @Test
+    public void testDownloadAndLauncherAcceptsCorrectApps() {
+        mEntry.isHomeApp = false;
+        mEntry.hasLauncherEntry = false;
+
+        // should included updated system apps
+        when(mEntry.info.isInstantApp()).thenReturn(false);
+        mEntry.info.flags = ApplicationInfo.FLAG_UPDATED_SYSTEM_APP;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER.filterApp(mEntry))
+                .isTrue();
+
+        // should not include system apps other than the home app
+        mEntry.info.flags = ApplicationInfo.FLAG_SYSTEM;
+        mEntry.isHomeApp = false;
+        mEntry.hasLauncherEntry = false;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER.filterApp(mEntry))
+                .isFalse();
+
+        // should include the home app
+        mEntry.isHomeApp = true;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER.filterApp(mEntry))
+                .isTrue();
+
+        // should include any System app with a launcher entry
+        mEntry.isHomeApp = false;
+        mEntry.hasLauncherEntry = true;
+        assertThat(ApplicationsState.FILTER_DOWNLOADED_AND_LAUNCHER.filterApp(mEntry))
+                .isTrue();
+    }
+
+    @Test
     public void testInstantFilterAcceptsInstantApp() {
         when(mEntry.info.isInstantApp()).thenReturn(true);
         assertThat(ApplicationsState.FILTER_INSTANT.filterApp(mEntry)).isTrue();