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, 6 insertions, 0 deletions

diff --git a/res/layout/dictionary_download_item.xml b/res/layout/dictionary_download_item.xml
new file mode 100644
index 0000000..e6dd3c6
--- /dev/null
+++ b/res/layout/dictionary_download_item.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" style="@style/dictionary_download_item">
+  <TextView android:id="@+id/dictionary_download_locale" style="@style/dictionary_download_locale"/>
+  <TextView android:id="@+id/dictionary_download_size" style="@style/dictionary_download_size"/>
+  <View android:id="@+id/dictionary_download_button" style="@style/dictionary_download_button" android:background="@drawable/ic_download"/>
+</LinearLayout>