Add sensor data measurement and show it on screen

.gradle/6.1.1/executionHistory/executionHistory.lock

.gradle/6.1.1/fileChanges/last-build.bin

.gradle/6.1.1/fileHashes/fileHashes.lock

.gradle/6.1.1/gc.properties

.gradle/buildOutputCleanup/buildOutputCleanup.lock

.gradle/buildOutputCleanup/cache.properties

.gradle/checksums/checksums.lock

.gradle/vcs-1/gc.properties

.vscode/launch.json

android/gradle.properties

lib/main.dart

pubspec.lock

pubspec.yaml