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.

2 files changed, 12 insertions, 0 deletions

diff --git a/vendor/Android.mk b/vendor/Android.mk
new file mode 100644
index 0000000..8a54c3d
--- /dev/null
+++ b/vendor/Android.mk
@@ -0,0 +1,12 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/cdict/libcdict
+LOCAL_CFLAGS +=
+# -Wall -Wextra -Werror
+LOCAL_SRC_FILES := cdict/libcdict/libcdict.c cdict/java/jni/juloo_cdict_Cdict.c
+LOCAL_MODULE := libcdict_java
+LOCAL_SDK_VERSION := 21
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/vendor/cdict b/vendor/cdict
new file mode 160000
+Subproject aa1c986e79a632dff0a81f92c75d720e80aa844