Fixed ApnEditor crash issue

This root caused is that we closed the managed cursor which lifecycle is
managed by Activity.

Actually, we don't need the managed cursor in this case, just use the
normal cursor and close it after we got the apn data from the database.

Bug: 77894798
Test: make ROBOTEST_FILTER=ApnEditorTest -j40 RunSettingsRoboTests
Change-Id: I6eb80bbd53354e00e871e974f520668dcbceac63

tests/robotests/src/com/android/settings/network/ApnEditorTest.java

@@ -21,6 +21,7 @@ import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 
@@ -115,6 +116,24 @@ public class ApnEditorTest {
         mApnEditorUT.sNotSet = "Not Set";
     }
 
+    @Test
+    public void testApnEditor_doesNotUseManagedQuery() {
+        mApnEditorUT.getApnDataFromUri(Mockito.mock(Uri.class));
+
+        verify(mActivity, never()).managedQuery(
+                any(Uri.class),
+                any(String[].class),
+                any(String.class),
+                any(String.class));
+
+        verify(mActivity, never()).managedQuery(
+                any(Uri.class),
+                any(String[].class),
+                any(String.class),
+                any(String[].class),
+                any(String.class));
+  }
+
     @Test
     public void testSetStringValue_valueChanged_shouldSetValue() {
         // GIVEN an APN value which is different than the APN value in database