update tools

Change-Id: I365babbcf2e8b1840b072623beb109521b723ac7

docker/Dockerfile

@@ -56,7 +56,7 @@ ENV PATH=${PATH}:${ANDROID_HOME}/tools/bin
 
 # Android SDK libraries, NDK
 RUN sdkmanager --sdk_root=${ANDROID_HOME} --update
-RUN (while sleep 1; do echo "y"; done) | sdkmanager --sdk_root=${ANDROID_HOME} 'build-tools;29.0.3' \
+RUN (while sleep 1; do echo "y"; done) | sdkmanager --sdk_root=${ANDROID_HOME} 'build-tools;30.0.2' \
 	'platforms;android-29'\
 	'extras;android;m2repository'\
 	'extras;google;m2repository'\

ring-android/app/build.gradle

@@ -4,7 +4,7 @@ def buildFirebase = project.hasProperty('buildFirebase') || getGradle().getStart
 
 android {
     compileSdkVersion 29
-    buildToolsVersion '29.0.3'
+    buildToolsVersion '30.0.2'
     ndkVersion "21.3.6528147"
     defaultConfig {
         minSdkVersion 21