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, 32 insertions, 1 deletions

diff --git a/res/values/styles.xml b/res/values/styles.xml
index 5defb7b..6977e00 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -64,7 +64,7 @@
     <item name="android:layout_width">fill_parent</item>
     <item name="android:layout_height">wrap_content</item>
     <item name="android:layout_marginVertical">8dp</item>
-    <item name="android:layout_marginHorizontal">16dp</item>
+    <item name="android:layout_marginHorizontal">24dp</item>
     <item name="android:layout_gravity">center</item>
   </style>
   <style name="anim">
@@ -90,6 +90,37 @@
     <item name="android:layout_width">wrap_content</item>
     <item name="android:orientation">horizontal</item>
   </style>
+  <!-- Dictionaries activity -->
+  <style name="dictionary_list_view">
+    <item name="android:layout_width">fill_parent</item>
+    <item name="android:layout_height">wrap_content</item>
+    <item name="android:layout_marginVertical">24dp</item>
+  </style>
+  <style name="dictionary_download_item">
+    <item name="android:orientation">horizontal</item>
+    <item name="android:layout_width">fill_parent</item>
+    <item name="android:layout_height">wrap_content</item>
+    <item name="android:layout_marginVertical">8dp</item>
+    <item name="android:gravity">center</item>
+    <item name="android:paddingHorizontal">48dp</item>
+  </style>
+  <style name="dictionary_download_locale">
+    <item name="android:layout_weight">1</item>
+    <item name="android:layout_width">fill_parent</item>
+    <item name="android:layout_height">wrap_content</item>
+    <item name="android:textSize">16sp</item>
+  </style>
+  <style name="dictionary_download_size">
+    <item name="android:layout_weight">0</item>
+    <item name="android:layout_width">wrap_content</item>
+    <item name="android:layout_height">wrap_content</item>
+    <item name="android:layout_marginRight">8dp</item>
+    <item name="android:textSize">12sp</item>
+  </style>
+  <style name="dictionary_download_button">
+    <item name="android:layout_width">24dp</item>
+    <item name="android:layout_height">24dp</item>
+  </style>
   <style name="appTheme" parent="@android:style/Theme.Material.Light"/>
   <style name="settingsTheme" parent="appTheme">
     <!-- Setting this in the activity theme so it propagate to nested