Change watchdog PackageInfo to PackageConfig

Test: atest PackageWatchdogTest
Bug: 131165818
Change-Id: Ie3a385468a0de05bc55862e6f71513077d44bbc0

• Android.bp[diff]
• api/system-current.txt[diff]
• core/java/android/service/watchdog/ExplicitHealthCheckService.java[diff]
• core/java/android/service/watchdog/PackageConfig.aidl[Renamed from core/java/android/service/watchdog/PackageInfo.aidl - diff]
• core/java/android/service/watchdog/PackageInfo.java[Deleted - diff]
• packages/ExtServices/src/android/ext/services/watchdog/ExplicitHealthCheckServiceImpl.java[diff]
• services/core/java/com/android/server/ExplicitHealthCheckController.java[diff]
• services/core/java/com/android/server/PackageWatchdog.java[diff]
• tests/PackageWatchdog/src/com/android/server/PackageWatchdogTest.java[diff]