Recommend efficient String operations.

Android offers several efficient alternatives to some upstream
String operations, such as the newly added TextUtils.formatSimple().

This checker also detects and discourages transparent StringBuilder
operations related to Preconditions, where we always pay the cost of
building the failure message string, even in the successful case.

Bug: 170978902
Test: atest error_prone_android_framework_test
Change-Id: I8cef4c50d8b0da3f1e66727dfa724ad44b88963b