Merge branch 'add-exponential-back-off-to-payment-verification-droid-… #8664

Job	Run time
Prepare	4s
Build native (x86_64, x86_64, x86_64-linux-android)	1m 28s
Generate relay list	1m 20s
Build native (i686, x86, i686-linux-android)	1m 27s
Build native (aarch64, arm64-v8a, aarch64-linux-android)	1m 36s
Build native (armv7, armeabi-v7a, armv7-linux-androideabi)	1m 24s
Build app and run unit tests	8m 42s
Run instrumented tests (app)	5m 23s
Run instrumented firebase tests	0s
Run instrumented tests (mockapi)	1m 46s
	23m 10s

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