Spell checking (#1137)

This adds dictionary-based spell checking to the keyboard. The keyboard looks at the word being typed and matches it against a dictionary to either complete the rest of the word or find alternative spellings.

The core of this feature is implemented in cdict, which is included as a
submodule in vendor/cidct.

Cdict is developped at https://github.com/Julow/cdict
The dictionaries are hosted at https://github.com/Julow/Unexpected-Keyboard-dictionaries/
The wordlists used to build the dictionaries are the same ones used by
HeliBoard from https://codeberg.org/Helium314/aosp-dictionaries

- Add an activity accessible from the launcher app that lists available
  dictionaries with a download button.
  The DictionaryListView view shows the list of available dictionaries and
  handles downloading and installing them.

- The Dictionaries class manages installed dictionaries. Dictionaries are
  installed as individual files into the app's private directory.

- Available dictionaries are listed in dictionaries.xml, which is generated
  when building Unexpected-Keyboard-dictionaries.
  method.xml mentions the dictionary name for each locales.

1 files changed, 12 insertions, 0 deletions

diff --git a/srcs/juloo.keyboard2/Utils.java b/srcs/juloo.keyboard2/Utils.java
index 5cc1664..ae82474 100644
--- a/srcs/juloo.keyboard2/Utils.java
+++ b/srcs/juloo.keyboard2/Utils.java
@@ -9,6 +9,8 @@ import android.view.View;
 import android.view.Window;
 import android.view.WindowInsets;
 import android.view.WindowManager;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.Locale;
@@ -49,4 +51,14 @@ public final class Utils
       out.append(buff, 0, l);
     return out.toString();
   }
+
+  public static byte[] read_all_bytes(InputStream inp) throws IOException
+  {
+    ByteArrayOutputStream out = new ByteArrayOutputStream();
+    byte[] buff = new byte[128000];
+    int l;
+    while ((l = inp.read(buff)) != -1)
+      out.write(buff, 0, l);
+    return out.toByteArray();
+  }
 }