More fixes from crash reported by Google Play Store

app/src/main/java/org/linphone/contacts/ContactDetailsFragment.java

@@ -367,12 +367,16 @@ public class ContactDetailsFragment extends Fragment implements ContactsUpdatedL
         if (core == null) return;
 
         Address participant = Factory.instance().createAddress(tag);
+        if (participant == null) {
+            Log.e("[Contact Detail] Couldn't parse ", tag);
+            return;
+        }
         ProxyConfig defaultProxyConfig = core.getDefaultProxyConfig();
 
         if (defaultProxyConfig != null) {
             ChatRoom room =
                     core.findOneToOneChatRoom(
-                            defaultProxyConfig.getContact(), participant, isSecured);
+                            defaultProxyConfig.getIdentityAddress(), participant, isSecured);
             if (room != null) {
                 ((ContactsActivity) getActivity())
                         .showChatRoom(room.getLocalAddress(), room.getPeerAddress());

app/src/main/java/org/linphone/contacts/LinphoneContact.java

@@ -531,7 +531,9 @@ public class LinphoneContact extends AndroidContact
     }
 
     private synchronized void syncValuesFromAndroidContact(Context context) {
-        Cursor c =
+        Cursor c = null;
+        try {
+            c =
                     context.getContentResolver()
                             .query(
                                     ContactsContract.Data.CONTENT_URI,
@@ -543,6 +545,10 @@ public class LinphoneContact extends AndroidContact
                                             + mAndroidId,
                                     null,
                                     null);
+        } catch (SecurityException se) {
+            Log.e("[Contact] Security exception: ", se);
+        }
+
         if (c != null) {
             mAddresses = new ArrayList<>();
             while (c.moveToNext()) {

app/src/main/java/org/linphone/history/HistoryDetailFragment.java

@@ -260,12 +260,16 @@ public class HistoryDetailFragment extends Fragment {
         if (core == null) return;
 
         Address participant = Factory.instance().createAddress(mSipUri);
+        if (participant == null) {
+            Log.e("[History Detail] Couldn't parse ", mSipUri);
+            return;
+        }
         ProxyConfig defaultProxyConfig = core.getDefaultProxyConfig();
 
         if (defaultProxyConfig != null) {
             ChatRoom room =
                     core.findOneToOneChatRoom(
-                            defaultProxyConfig.getContact(), participant, isSecured);
+                            defaultProxyConfig.getIdentityAddress(), participant, isSecured);
             if (room != null) {
                 ((HistoryActivity) getActivity())
                         .showChatRoom(room.getLocalAddress(), room.getPeerAddress());

app/src/main/java/org/linphone/settings/NetworkSettingsFragment.java

@@ -198,7 +198,11 @@ public class NetworkSettingsFragment extends SettingsFragment {
                         mPrefs.powerSaverDialogPrompted(true);
                         Intent intent = DeviceUtils.getDevicePowerManagerIntent(getActivity());
                         if (intent != null) {
+                            try {
                                 startActivity(intent);
+                            } catch (SecurityException se) {
+                                Log.e("[Network Settings] Security exception: ", se);
+                            }
                         }
                     }
                 });