Add an option to debug builds to create fake test data

...n/java/org/briarproject/bramble/plugin/tor/TorPlugin.java

.../org/briarproject/bramble/api/plugin/LanTcpConstants.java

...ava/org/briarproject/bramble/api/plugin/TorConstants.java

.../main/java/org/briarproject/bramble/util/StringUtils.java

...rc/test/java/org/briarproject/bramble/test/TestUtils.java

...ava/org/briarproject/bramble/plugin/tcp/LanTcpPlugin.java

...org/briarproject/bramble/client/ClientHelperImplTest.java

...c/test/java/org/briarproject/bramble/crypto/HashTest.java

...t/java/org/briarproject/bramble/crypto/SignatureTest.java

...java/org/briarproject/bramble/data/BdfReaderImplTest.java

...java/org/briarproject/bramble/data/BdfWriterImplTest.java

...rc/test/java/org/briarproject/bramble/db/BasicH2Test.java

...rg/briarproject/bramble/db/DatabaseComponentImplTest.java

...test/java/org/briarproject/bramble/db/H2DatabaseTest.java

...riarproject/bramble/identity/IdentityManagerImplTest.java

...ct/bramble/properties/TransportPropertyValidatorTest.java

...va/org/briarproject/bramble/sync/SyncIntegrationTest.java

.../briarproject/bramble/sync/ValidationManagerImplTest.java

...java/org/briarproject/bramble/test/ValidatorTestCase.java

...java/org/briarproject/briar/android/AndroidComponent.java