Bump targetSdkVersion to "30"

With this CL, versionCode, targetSdkVersion and minSdkVersion will be
bumped/set as follows:

       versionCode: 28 -> 30
  targetSdkVersion: 28 -> 30
     minSdkVersion: 21

As far as we know, there should be no user-visible behavior change on
supported OS versions.

Fix: 189558760
Test: manually verified that LatinIME still is functional
Change-Id: I3a7deb452960b370f5290f3d1bac9c79fe935303
Merged-In: I4bf7588c62fb77bf78d4afcb665e9bfbbef53966
(cherry picked from commit 360052f304)

java/Android.bp

@@ -53,8 +53,8 @@ android_app {
     // Include all the resources regardless of system supported locales
     aapt_include_all_resources: true,
 
-    min_sdk_version: "14",
-    target_sdk_version: "23",
+    min_sdk_version: "21",
+    target_sdk_version: "30",
     sdk_version: "current",
 
     product_specific: true,

java/AndroidManifest.xml

@@ -17,10 +17,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
      coreApp="true"
      package="com.android.inputmethod.latin"
-     android:versionCode="28">
+     android:versionCode="30">
 
     <uses-sdk android:minSdkVersion="21"
-         android:targetSdkVersion="28"/>
+         android:targetSdkVersion="30"/>
 
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
     <uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION"/>

tests/Android.bp

@@ -50,6 +50,6 @@ android_test {
     instrumentation_for: "LatinIME",
 
     min_sdk_version: "14",
-    target_sdk_version: "21",
+    target_sdk_version: "30",
     sdk_version: "current",
 }

tests/AndroidManifest.xml

@@ -16,9 +16,9 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.android.inputmethod.latin.tests"
-    android:versionCode="28">
+    android:versionCode="30">
 
-    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
+    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="30" />
 
     <uses-permission android:name="android.permission.READ_CONTACTS" />