Prevent screen rotation everywhere

app/src/main/AndroidManifest.xml

@@ -18,16 +18,19 @@
         <activity
                 android:name=".SettingsActivity"
                 android:label="@string/title_activity_settings"
+                android:screenOrientation="portrait"
                 android:parentActivityName=".SendActivity">
             <meta-data
                     android:name="android.support.PARENT_ACTIVITY"
                     android:value="com.adityapk.zcash.zqwandroid.SendActivity"/>
         </activity>
-        <activity android:name=".QrReaderActivity">
+        <activity android:name=".QrReaderActivity"
+                  android:screenOrientation="portrait">
         </activity>
         <activity
                 android:name=".TxDetailsActivity"
                 android:label="@string/title_activity_tx_details"
+                android:screenOrientation="portrait"
                 android:parentActivityName=".MainActivity"
                 android:theme="@style/AppTheme.NoActionBar">
             <meta-data