fix incremental installation test

1) Removed property test because CTS tests does not have permission to
reset properties or permission to read IncFs_Enabled via jni.
2) Use system property to check if incfs is available.
3) Updated the test files.

BUG: 150476123
Test: atest PackageManagerShellCommandIncrementalTest
Change-Id: Ic2a1d2ce7565eb7fa4bd4327d021551ba26dd110
(cherry picked from commit 71a57b7c6c8abec55c2b287d690dc93f68db5c7f)
diff --git a/tests/tests/content/AndroidTest.xml b/tests/tests/content/AndroidTest.xml
index 67cf9c2..3e27884 100644
--- a/tests/tests/content/AndroidTest.xml
+++ b/tests/tests/content/AndroidTest.xml
@@ -51,9 +51,14 @@
         <option name="push-file" key="HelloWorld7_xhdpi-v4.apk" value="/data/local/tmp/cts/content/HelloWorld7_xhdpi-v4.apk" />
         <option name="push-file" key="HelloWorld7_xxhdpi-v4.apk" value="/data/local/tmp/cts/content/HelloWorld7_xxhdpi-v4.apk" />
         <option name="push-file" key="HelloWorld7_xxxhdpi-v4.apk" value="/data/local/tmp/cts/content/HelloWorld7_xxxhdpi-v4.apk" />
-        <option name="push-file" key="v4-only-original.apk" value="/data/local/tmp/cts/content/v4-only-original.apk" />
-        <option name="push-file" key="v4-only-original.apk.idsig" value="/data/local/tmp/cts/content/v4-only-original.apk.idsig" />
-    </target_preparer>
+      </target_preparer>
+
+      <!-- Incremental installation test files -->
+      <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+          <option name="cleanup" value="true" />
+          <option name="push" value="v4-only-original.apk->/data/local/tmp/cts/content/v4-only-original.apk" />
+          <option name="push" value="v4-only-original.apk.idsig->/data/local/tmp/cts/content/v4-only-original.apk.idsig" />
+      </target_preparer>
 
     <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
         <option name="cleanup-apks" value="true" />
diff --git a/tests/tests/content/data/v4-only-original.apk.idsig b/tests/tests/content/data/v4-only-original.apk.idsig
index aa2d5d5..3ac4c80 100644
--- a/tests/tests/content/data/v4-only-original.apk.idsig
+++ b/tests/tests/content/data/v4-only-original.apk.idsig
Binary files differ
diff --git a/tests/tests/content/src/android/content/pm/cts/PackageManagerShellCommandIncrementalTest.java b/tests/tests/content/src/android/content/pm/cts/PackageManagerShellCommandIncrementalTest.java
index ce37d05..fa55d18 100644
--- a/tests/tests/content/src/android/content/pm/cts/PackageManagerShellCommandIncrementalTest.java
+++ b/tests/tests/content/src/android/content/pm/cts/PackageManagerShellCommandIncrementalTest.java
@@ -20,14 +20,16 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import android.content.Context;
+import android.content.pm.PackageManager;
 import android.os.ParcelFileDescriptor;
-import android.os.incremental.IncrementalManager;
 import android.platform.test.annotations.AppModeFull;
 
 import androidx.test.InstrumentationRegistry;
 import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.After;
+import org.junit.Assume;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -120,25 +122,13 @@
 
     @Test
     public void testInstallWithIdSig() throws Exception {
-        if (!IncrementalManager.isAllowed()) {
-            return;
-        }
+        final Context context = InstrumentationRegistry.getInstrumentation().getContext();
+        Assume.assumeTrue(context.getPackageManager().hasSystemFeature(
+                PackageManager.FEATURE_INCREMENTAL_DELIVERY));
         installPackage(TEST_APK);
         assertTrue(isAppInstalled(TEST_APP_PACKAGE));
     }
 
-    @Test
-    public void testProperty() {
-        if (!IncrementalManager.isAllowed()) {
-            return;
-        }
-
-        android.os.SystemProperties.set("incremental.allowed", "0");
-        assertFalse(IncrementalManager.isAllowed());
-        android.os.SystemProperties.set("incremental.allowed", null);
-        assertTrue(IncrementalManager.isAllowed());
-    }
-
     private boolean isAppInstalled(String packageName) throws IOException {
         final String commandResult = executeShellCommand("pm list packages");
         final int prefixLength = "package:".length();