fix migration of devices with permission timeouts

app/build.gradle

@@ -8,8 +8,8 @@ android {
         applicationId "com.m2049r.xmrwallet"
         minSdkVersion 21
         targetSdkVersion 30
-        versionCode 1006
-        versionName "2.0.6 'Puginarug'"
+        versionCode 1007
+        versionName "2.0.7 'Puginarug'"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {

app/src/main/java/com/m2049r/xmrwallet/util/LegacyStorageHelper.java

@@ -31,8 +31,7 @@ public class LegacyStorageHelper {
         try {
             if (isStorageMigrated(context)) return;
             if (!hasReadPermission(context)) {
-                // nothing to migrate, so don't try again
-                setStorageMigrated(context);
+                // can't migrate - don't remember this, as the user may turn on permissions later
                 return;
             }
             final File oldRoot = getWalletRoot();