Fix android emulator testing (#1750)

The old code frequently timed out waiting for the android emulator to start, but this new code makes it much more consistently successful at starting up the emulator

vsts/StartEmulator.sh

@@ -1,18 +1,18 @@
 #!/usr/bin/env bash
 
 echo 'Listing available android sdks for installation'
-$ANDROID_HOME/tools/bin/sdkmanager --list | grep system-images
+$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager --list | grep system-images
 
 emulatorImage='system-images;android-28;google_apis;x86_64'
 avdName='Pixel_9.0'
 
 echo ''
 echo "Installing emulator image ${emulatorImage}"
-echo "y" | $ANDROID_HOME/tools/bin/sdkmanager --install $emulatorImage
+echo "y" | $ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager --install $emulatorImage
 
 echo ''
 echo "Creating android emulator with name ${avdName}"
-echo "no" | $ANDROID_HOME/tools/bin/avdmanager create avd -n $avdName -k $emulatorImage --force
+echo "no" | $ANDROID_HOME/cmdline-tools/latest/bin/avdmanager create avd -n $avdName -k $emulatorImage --force
 
 echo ''
 echo 'Listing active android emulators'
@@ -24,9 +24,9 @@ nohup $ANDROID_HOME/emulator/emulator -avd $avdName -gpu auto -no-snapshot > /de
 
 echo ''
 echo 'Waiting for emulator to boot up...'
-$ANDROID_HOME/platform-tools/adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed | tr -d '\r') ]]; do sleep 1; done; input keyevent 82'
-echo ''
-echo "Emulator started"
+nohup $ANDROID_HOME/emulator/emulator -avd $avdName -no-snapshot -no-audio -no-boot-anim -accel auto -gpu auto -qemu -lcd-density 420 > /dev/null 2>&1 &
+    $ANDROID_HOME/platform-tools/adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed | tr -d '\r') ]]; do sleep 1; done'
+    $ANDROID_HOME/platform-tools/adb devices echo "Emulator started"
 
 $ANDROID_HOME/platform-tools/adb devices