Workflow improvements (#3891)

* add caching steps to build_check workflow

* add gradle.properites for github runner

* refactor ci-gradle.properties

* specify ndk versiion in build.gradle

* remove ndk install and cache steps from build_check

* moved runner files to separate folder

* refactor build_check.yml

.github/runner-files/checksum.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+RESULT_FILE=$1
+
+if [ -f $RESULT_FILE ]; then
+  rm $RESULT_FILE
+fi
+touch $RESULT_FILE
+
+checksum_file() {
+  echo $(openssl md5 $1 | awk '{print $2}')
+}
+
+FILES=()
+while read -r -d ''; do
+  FILES+=("$REPLY")
+done < <(find . -type f \( -name "build.gradle*" -o -name "Dependencies.kt" -o -name "gradle-wrapper.properties" \) -print0)
+
+# Loop through files and append MD5 to result file
+for FILE in ${FILES[@]}; do
+  echo $(checksum_file $FILE) >> $RESULT_FILE
+done
+# Now sort the file so that it is 
+sort $RESULT_FILE -o $RESULT_FILE

.github/runner-files/ci-gradle.properties

@@ -0,0 +1,6 @@
+org.gradle.daemon=false
+org.gradle.jvmargs=-Xmx5120m
+org.gradle.workers.max=2
+
+kotlin.incremental=false
+kotlin.compiler.execution.strategy=in-process