Widens proguard to just keep everything under org.bouncycastle when minifying. Also fixes a bug where the composer's content warning is hidden after changing orientation.

app/proguard-rules.pro

@@ -59,5 +59,5 @@ public *;
 }
 
 # for bouncycastle
--keep class org.bouncycastle.jce.provider.**
+-keep class org.bouncycastle.**
 -dontwarn javax.naming.**

app/src/main/java/com/keylesspalace/tusky/ComposeActivity.java

@@ -310,11 +310,13 @@ public class ComposeActivity extends BaseActivity implements ComposeOptionsFragm
                 }
             } else {
                 String contentWarning = intent.getStringExtra("saved_toot_content_warning");
-                startingHideText = !TextUtils.isEmpty(contentWarning);
+                if (contentWarning != null) {
+                    startingHideText = !contentWarning.isEmpty();
                     if (startingHideText) {
                         startingContentWarning = contentWarning;
                     }
                 }
+            }
 
             // If come from SavedTootActivity
             String savedTootText = intent.getStringExtra("saved_toot_text");