Merge branch 'feat/continuous-profiling-part1' into feat/continuous-profiling-app-start-option

# Conflicts:
#	sentry-android-core/src/main/java/io/sentry/android/core/ManifestMetadataReader.java
#	sentry-android-core/src/test/java/io/sentry/android/core/ManifestMetadataReaderTest.kt
#	sentry/api/sentry.api
#	sentry/src/main/java/io/sentry/ExperimentalOptions.java
#	sentry/src/main/java/io/sentry/SentryAppStartProfilingOptions.java
#	sentry/src/main/java/io/sentry/SentryOptions.java
#	sentry/src/test/java/io/sentry/JsonSerializerTest.kt
#	sentry/src/test/java/io/sentry/SentryOptionsTest.kt

Author: stefanosiano