Fix extractNativeLib condition check

Should always extract native lib if it is not an incremental installation.

BUG: 146781591
Test: manual and check that *.so files are extracted.

$ adb install ~/Downloads/megacity.apk
$ adb shell
coral:/ # ls -R /data/app/com.unity.megacity-yNpLT0e2Zslj3bSo1EpYTg\=\=/lib/
/data/app/com.unity.megacity-yNpLT0e2Zslj3bSo1EpYTg==/lib/:
arm64

/data/app/com.unity.megacity-yNpLT0e2Zslj3bSo1EpYTg==/lib/arm64:
libil2cpp.so  libmain.so  libunity.so

Change-Id: I2b3bdf279e5d5f48304ffe10410469d41dc34625

services/core/java/com/android/server/pm/PackageInstallerSession.java

@@ -119,7 +119,6 @@ import com.android.internal.content.PackageHelper;
 import com.android.internal.os.SomeArgs;
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.IndentingPrintWriter;
-import com.android.internal.util.Preconditions;
 import com.android.server.LocalServices;
 import com.android.server.pm.Installer.InstallerException;
 import com.android.server.pm.dex.DexManager;
@@ -1684,7 +1683,7 @@ public class PackageInstallerSession extends IPackageInstallerSession.Stub {
                 computeProgressLocked(true);
 
                 // Unpack native libraries for non-incremental installation
-                if (isIncrementalInstallation()) {
+                if (!isIncrementalInstallation()) {
                     extractNativeLibraries(stageDir, params.abiOverride, mayInheritNativeLibs());
                 }
             }