Flavor specific purchase prefs

app/src/amazon/res/values/keys.xml

@@ -3,4 +3,5 @@
   <string name="sku_themes">themes</string>
   <string name="common_google_play_services_notification_ticker">Google Play services error</string>
   <string name="market_url">amzn://apps/android?p=org.tasks</string>
+  <string name="p_purchases">purchases_amazon</string>
 </resources>

app/src/generic/res/values/keys.xml

@@ -3,4 +3,5 @@
   <string name="sku_themes">themes</string>
   <string name="common_google_play_services_notification_ticker">Google Play services error</string>
   <string name="market_url">https://f-droid.org/en/packages/org.tasks/</string>
+  <string name="p_purchases">purchases_fdroid</string>
 </resources>

app/src/googleplay/res/values/keys.xml

@@ -3,4 +3,5 @@
   <string name="gp_key">MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAk8mXRE3dDXwtinUILCEzKjov2rxs3kZbLRzNrcjFWXpG9OEsUzRGLzqEN+WwibVuMRpZLj/+IxbU2sJWq/M0q+90rOhmXn46ZPeNyr77IqX2pWKIAWpzBoWq/mshRwtm9m1FIiGdBNlXrhSE7u3TGB5FuEuuSqKWvWzxeqQ7fHmlM04Lqrh1mN3FaMne8rWv+DWVHDbLrtnXBuC36glOAj17HxrzaE2v6Pv7Df3QefJ3rM1+0fAp/5jNInaP0qHAlG8WTbUmDShQ5kG3urbv3HLByyx6TSqhmNudXUK/6TusvIj50OptAG7x+UFYf956dD3diXhY3yoICvyFWx1sNwIDAQAB</string>
   <string name="play_services_available">play_services_available</string>
   <string name="market_url">market://details?id=org.tasks</string>
+  <string name="p_purchases">purchases</string>
 </resources>

app/src/main/res/values/keys.xml

@@ -298,7 +298,6 @@
   <string name="p_debug_pro">debug_pro</string>
   <string name="warned_play_services">warned_play_services</string>
   <string name="p_background_sync_unmetered_only">background_sync_unmetered_only</string>
-  <string name="p_purchases">purchases</string>
   <string name="p_sync_ongoing">sync_ongoing</string>
   <string name="p_last_backup">last_backup</string>
   <string name="p_show_description">show_description</string>