Fix HttpHeaders.getAcceptableLanguages() on empty headers #46776

Job	Run time
Initial JDK 17 Build	11m 42s
Attach pull request number	9s
CI Sanity Check	31s
Calculate Test Jobs	10s
Maven Tests - JDK 17	8m 7s
JVM Tests - JDK 17	2h 53m 32s
Maven Tests - JDK 17 Windows	12m 12s
JVM Tests - JDK 21	3h 15m 7s
Gradle Tests - JDK 17	29m 47s
JVM Tests - JDK 17 Windows	3h 0m 32s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Gradle Tests - JDK 17 Windows	51m 48s
Kubernetes Tests - JDK 17	17m 29s
Kubernetes Tests - JDK 21	16m 55s
Kubernetes Tests - JDK 17 Windows	18m 41s
Native Tests - Virtual Thread - Main	24m 40s
Native Tests - Virtual Thread - Messaging	10m 52s
Native Tests - Virtual Thread - Security	3m 28s
Native Tests - Main	2m 30s
Quickstarts Compilation - JDK 17	7m 20s
Native Tests - Data1	41m 8s
Native Tests - Data2	30m 55s
MicroProfile TCKs Tests	15m 0s
Native Tests - Data3	22m 27s
Native Tests - Data4	22m 39s
Native Tests - Data5	18m 25s
Native Tests - Data6	21m 52s
Native Tests - Data7	39m 27s
Native Tests - Amazon	17m 44s
Native Tests - Messaging1	27m 34s
Native Tests - Security2	22m 37s
Native Tests - Security3	11m 43s
Native Tests - Cache	17m 56s
Native Tests - HTTP	29m 57s
Native Tests - Misc1	13m 7s
Native Tests - Misc2	15m 2s
Native Tests - Misc3	24m 55s
Native Tests - Misc4	40m 58s
Native Tests - Spring	14m 47s
Native Tests - gRPC	17m 23s
Native Tests - Windows support	8m 12s
Upload build stats to collector	0s
Build report	53s
	20h 40m 13s

Provide feedback