commit f2464f70f2fea49805acbff262be8d447828c44c
author Yohei Yukawa <yukawa@google.com> Mon Dec 20 10:34:34 2021 -0800
committer Yohei Yukawa <yukawa@google.com> Mon Dec 20 10:34:34 2021 -0800
tree e25c9c5d6665c35414d6138a10caa68dfa0e19d8
parent 1ada019953b1c6687acce8d0d4625fe35cd12389

Set targetSdkVersion=31 to ThemedNavBarKeyboard

With this CL, ThemedNavBarKeyboard sameple IME will have an explicitly
set targetSdkVersion=31 so that it can be installed on older version
of Android OSes.

This CL also explicitly sets "android:exported", which has been
required in AndroidManifest.xml since API 31.

Fix: 211463997
Test: Manually verified as follows
 1. Flash SQ1A.211205.008 aosp_coral-userdebug into coral
 2. make -j ThemedNavBarKeyboard
 3. adb install -r $ANDROID_PRODUCT_OUT/system/app/ThemedNavBarKeyboard/ThemedNavBarKeyboard.apk
Change-Id: Idd88031a6b65cca58add8abe42794bc5f01b1973