Convert the app signature check to use SHA-256 instead of SHA1.

Test:atest cts/tests/tests/telephony/current/src/android/telephony/cts/TelephonyManagerTest.java
Test2:atest cts/tests/tests/telephony/current/src/android/telephony/cts/TelephonyManagerTestOnMockModem.java
Test3: manual test with Fi's TychoApk-debug.apk
Bug: 321868791
Bug: 326325598
Change-Id: I96cb01864b3db3640664d549337fbe30aee262c9
3 files changed