Fix a potential NPE when allocating space for compressed apex

Bug: 189369298
Test: th
Change-Id: I9357be8021e77fc8c3839f15a4a53c2a3c63cb13

services/core/java/com/android/server/recoverysystem/RecoverySystemService.java

@@ -968,6 +968,12 @@ public class RecoverySystemService extends IRecoverySystem.Stub implements Reboo
         }
         try {
             CompressedApexInfoList apexInfoList = getCompressedApexInfoList(packageFile);
+            if (apexInfoList == null) {
+                Log.i(TAG, "apex_info.pb not present in OTA package. "
+                            + "Assuming device doesn't support compressed"
+                            + "APEX, continueing without allocating space.");
+                return true;
+            }
             ApexManager apexManager = ApexManager.getInstance();
             apexManager.reserveSpaceForCompressedApex(apexInfoList);
             return true;