Zip larger log files only

app/src/main/java/eu/faircode/email/Log.java

@@ -174,6 +174,7 @@ public class Log {
     private static final long MAX_LOG_SIZE = 8 * 1024 * 1024L;
     private static final int MAX_CRASH_REPORTS = (BuildConfig.TEST_RELEASE ? 50 : 5);
     private static final long MIN_FILE_SIZE = 1024 * 1024L;
+    private static final long MIN_ZIP_SIZE = 1024 * 1024L;
     private static final String TAG = "fairemail";
 
     // https://docs.oracle.com/javase/8/docs/technotes/guides/net/proxies.html
@@ -2631,7 +2632,7 @@ public class Log {
             }
 
             db.attachment().setDownloaded(attachment.id, size);
-            if (!BuildConfig.DEBUG)
+            if (!BuildConfig.DEBUG && size > MIN_ZIP_SIZE)
                 attachment.zip(context);
         } catch (Throwable ex) {
             Log.e(ex);
@@ -2741,7 +2742,7 @@ public class Log {
                 }
 
                 db.attachment().setDownloaded(attachment.id, size);
-                if (!BuildConfig.DEBUG)
+                if (!BuildConfig.DEBUG && size > MIN_ZIP_SIZE)
                     attachment.zip(context);
             } finally {
                 if (proc != null)