Rename isSdkSandboxActivity -> isSdkSandboxActivityIntent

Bug: 313822860
Test: atest SdkSandboxInstrumentationTest SdkSandboxManagerUnitTest SdkSandboxManagerServiceUnitTest SdkSandboxActivityAuthorityTest
Change-Id: I756275bf8f58ee83cf9f2cf48bb5f0046654cd2c
4 files changed