ConfigRecorder: fix value changed check with null build-time values #36839

Job	Run time
CI Sanity Check	31s
Initial JDK 17 Build	11m 29s
Attach pull request number	2s
Calculate Test Jobs	9s
Maven Tests - JDK 17	1h 3m 20s
Devtools Tests - JDK 17	15m 5s
Maven Tests - JDK 17 Windows	1h 19m 9s
Devtools Tests - JDK 21	14m 19s
Gradle Tests - JDK 17	25m 36s
JVM Tests - JDK 17	3h 41m 37s
Gradle Tests - JDK 17 Windows	51m 29s
Devtools Tests - JDK 17 Windows	20m 31s
Kubernetes Tests - JDK 17	12m 52s
JVM Tests - JDK 21	3h 35m 17s
Kubernetes Tests - JDK 21	12m 13s
JVM Tests - JDK 17 Windows	3h 34m 39s
Kubernetes Tests - JDK 17 Windows	16m 32s
Quickstarts Compilation - JDK 17	6m 1s
Native Tests - Virtual Thread - Main	22m 8s
MicroProfile TCKs Tests	44m 4s
Native Tests - Virtual Thread - Messaging	9m 42s
Native Tests - Main	7m 41s
Native Tests - Data1	30m 23s
Native Tests - Data2	27m 48s
Native Tests - Data3	24m 34s
Native Tests - Data4	18m 39s
Native Tests - Data5	20m 38s
Native Tests - Data6	26m 1s
Native Tests - Data7	34m 49s
Native Tests - Amazon	7m 21s
Native Tests - Messaging1	31m 1s
Native Tests - Messaging2	13m 55s
Native Tests - Security1	22m 50s
Native Tests - Security2	29m 31s
Native Tests - Security3	12m 59s
Native Tests - Cache	14m 44s
Native Tests - HTTP	41m 15s
Native Tests - Misc1	26m 0s
Native Tests - Misc2	16m 59s
Native Tests - Misc3	34m 5s
Native Tests - Misc4	42m 58s
Native Tests - Spring	18m 52s
Native Tests - gRPC	17m 56s
Native Tests - Windows - RESTEasy Jackson	5m 33s
Native Tests - DevTools Integration Tests	3m 58s
Native Tests - AWT, ImageIO and Java2D	6m 13s
Build report	38s
	1d 2h 34m 6s

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