Enforce the import order consistent with the project policy (#1355)

### What's done:

 * As of now, there's the following order of imports:
 
   * `android.*`, `androidx.*`, `com.android.*`,
   * `org.cqfn.diktat.*`,
   * all other imports,
   * `java.*`, `javax.*`,
   * `kotlin.*`, `kotlinx.*`.

 * Additionally, `kotlin.code.style` property set to `official` in `pom.xml`.
 * See <https://kotlinlang.org/docs/code-style-migration-guide.html#in-maven> for more details.

.editorconfig

@@ -49,7 +49,7 @@ ij_kotlin_field_annotation_wrap = split_into_lines
 ij_kotlin_finally_on_new_line = false
 ij_kotlin_if_rparen_on_new_line = true
 ij_kotlin_import_nested_classes = false
-ij_kotlin_imports_layout = *,java.**,javax.**,kotlin.**,^
+ij_kotlin_imports_layout = android.**,androidx.**,com.android.**,org.cqfn.diktat.**,*,java.**,javax.**,kotlin.**,kotlinx.**,^
 ij_kotlin_insert_whitespaces_in_simple_one_line_method = true
 ij_kotlin_keep_blank_lines_before_right_brace = 2
 ij_kotlin_keep_blank_lines_in_code = 2

pom.xml

@@ -44,6 +44,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <kotlin.version>1.6.21</kotlin.version>
         <kotlin.compiler.incremental>true</kotlin.compiler.incremental>
+        <kotlin.code.style>official</kotlin.code.style>
         <kotlinx.serialization.version>1.3.3</kotlinx.serialization.version>
         <ktlint.version>0.45.2</ktlint.version>
         <junit.version>5.8.2</junit.version>